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Sperm (pl.: sperm or sperms) is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger,...

species in the sperm whale superfamily Physeteroidea, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic...

in females that stores sperm for later use, the sperm sac. Milt, sperm sacs, large sacs containing large amounts of matured sperm. Epididymis, a part of...

competition Sperm donation Sperm granuloma Sperm guidance Sperm heteromorphism Sperm motility Sperm precedence Sperm sorting Sperm theft Sperm washing Catch...

three extant species of whales: the sperm whale, in the genus Physeter, and the pygmy sperm whale and dwarf sperm whale, in the genus Kogia. In the past...

Livyatan is an extinct genus of highly predatory macroraptorial sperm whale, containing one known species: L. melvillei. The genus name was inspired by...

Sperm competition is the competitive process between spermatozoa of two or more different males to fertilize the same egg during sexual reproduction....

Female sperm can refer to either: A sperm which contains an X chromosome, produced in the usual way in the testicles, referring to the occurrence of such...

Artificial insemination is the deliberate introduction of sperm into the cervix or uterine cavity for the purpose of achieving pregnancy through in vivo...

Sperm competition is a form of post-copulatory sexual selection whereby male sperm simultaneously physically compete to fertilize a single ovum. Sperm...

Sperm donation is the provision by a male of their sperm with the intention that it be used in the artificial insemination or other "fertility treatment"...

A sperm granuloma is a lump of leaked sperm that appears along the vasa deferentia or epididymides in vasectomized individuals. While the majority of...

which is the female gonad. Its primary functions are the production of sperm and the secretion of androgens, primarily testosterone. The release of testosterone...

Sperm oil is a waxy liquid obtained from sperm whales. It is a clear, yellowish liquid with a very faint odor. One of its fractions is spermaceti, a highly...

The dwarf sperm whale (Kogia sima) is a sperm whale that inhabits temperate and tropical oceans worldwide, in particular continental shelves and slopes...

Sperm Wars is a popular science book by evolutionary biologist Robin Baker about sperm competition. Originally published in English in 1996, it has since...

Genetically modified sperm (GM sperm) is sperm that has undergone genetic modification for biomedical purposes, including the elimination of genetic diseases...

Sperm sorting is a means of choosing what type of sperm cell is to fertilize an egg cell using several conventional techniques of centrifugation or swim-up...

Ejaculation is the discharge of semen (the ejaculate; normally containing sperm) from the penis through the urethra. It is the final stage and natural objective...

a man. It is the sperm in the semen that is the fertile component, and therefore semen quality involves both sperm quantity and sperm quality. The volume...

result in pregnancy. "Sperm theft", also known as "unauthorized use of sperm", "spermjacking" or "spurgling" (a portmanteau of sperm and burgling), refers...

fertility, a measure of the ability of sperm in semen to accomplish fertilization. Semen quality involves both sperm quantity and quality. Semen quality...

The pygmy sperm whale (Kogia breviceps) is one of two extant species in the family Kogiidae in the sperm whale superfamily. They are not often sighted...

is also referred to as ejaculate analysis, human sperm assay (HSA), sperm function test, and sperm assay.[citation needed] Semen analysis is a complex...

Sperm chemotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) follow a concentration gradient of a chemoattractant secreted from the...

porpoises, and all other whales with teeth, such as beaked whales and the sperm whales. 73 species of toothed whales are described. They are one of two...

Human fertilization is the union of an egg cell and a sperm, occurring primarily in the ampulla of the fallopian tube. The result of this union leads...

Sperm motility describes the ability of sperm to move properly through the female reproductive tract (internal fertilization) or through water (external...

Testicular sperm extraction (TESE) is a surgical procedure in which a small portion of tissue is removed from the testicle and any viable sperm cells from...

transformed into spermatozoa (sperm) by the process of spermiogenesis. These develop into mature spermatozoa, also known as sperm cells. Thus, the primary...

Sperm precedence is the tendency of a female who has bred with multiple males to give birth to the offspring of those males in unequal proportions. It...

Monodontidae (belugas and narwhals), Physeteridae (the sperm whale), Kogiidae (the dwarf and pygmy sperm whale), and Ziphiidae (the beaked whales), as well...

Capacitation is a process sperm must undergo to prepare to fertilize an egg. This is a process that mature spermatozoa undergo after entering the oviduct...

Sperm washing is the process in which individual sperm are separated from the semen. Washed sperm is used in artificial insemination using the intrauterine...

Sperm donation laws vary by country. Most countries have laws to cover sperm donations which, for example, place limits on how many children a sperm donor...

introduction of sperm (in semen) into a female's reproductive system in order to fertilize the ovum through sexual reproduction. The sperm enters into the...

Intracytoplasmic sperm injection (ICSI /ˈɪksi/ IK-see) is an in vitro fertilization (IVF) procedure in which a single sperm cell is injected directly into...

/spərməˈsiːtiˌ -ˈsɛ-/, one of the fractions of sperm oil, is a waxy substance found in the head cavities of the sperm whale (and, in smaller quantities, in the...

parent. By convention, organisms that produce smaller gametes (spermatozoa, sperm) are called male, while organisms that produce larger gametes (ova, often...

complement. Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism (for species with two sperm types). Typically, only one sperm type is...

deferens (pl.: vasa deferentia), ductus deferens (pl.: ductūs deferentes), or sperm duct is part of the male reproductive system of many vertebrates. In mammals...

a sexual partner. Sperm sold by a sperm donor is known as donor sperm. A sperm bank may be a separate entity supplying donor sperm to individuals or to...

Robotic sperm (also called spermbots) are biohybrid microrobots consisting of sperm cells and artificial microstructures. Currently there are two types...

that produces, or is organized to produce, the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the process of fertilisation...

Sperm thermotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) actively change their swimming direction according to a temperature...

only one individual transferring sperm to the other, or the pair can transfer sperm bilaterally. Both forms of sperm transfer can occur in the same species...

Percutaneous epididymal sperm aspiration (PESA) is a technique used to determine sperm counts in the event of a possible blockage of the vas deferens....

established the need of interaction between the female's ovum and male's sperm to form a zygote in frogs. In 1827, Karl Ernst von Baer observed a therian...

Female sperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily...

low sperm count refer to semen with a low concentration of sperm and is a common finding in male infertility. Often, semen with a decreased sperm concentration...

Posthumous sperm retrieval (PSR) is a procedure in which spermatozoa are collected from the testes of a human corpse after brain death. There has been...

that maximise reproductive success and minimise sperm competition. Sperm competition is where the sperm of two males simultaneously occupy the reproductive...

For fertilization to happen between a sperm and egg cell, a sperm must first fuse with the plasma membrane and then penetrate the female egg cell to fertilize...

dolphins, the beaked whales and other predatory whales like the beluga and sperm whale, who prey upon fish, cephalopods and other marine mammals such as...

The Sperm (Thai: อสุจ๊าก, or Asujaak) is a 2007 Thai science fiction comedy film directed by Taweewat Wantha. A young, struggling Bangkok rock musician...

substance of a dull grey or blackish colour produced in the digestive system of sperm whales. Freshly produced ambergris has a marine, faecal odour. It acquires...

Sperm guidance is the process by which sperm cells (spermatozoa) are directed to the oocyte (egg) for the aim of fertilization. In the case of marine invertebrates...

Macroraptorial sperm whales were highly predatory whales of the sperm whale superfamily (Physeteroidea) of the Miocene epoch that hunted large marine mammals...

biology, polyspermy describes the fertilization of an egg by more than one sperm. Diploid organisms normally contain two copies of each chromosome, one from...

Sperm whaling is the human practice of hunting sperm whales, the largest toothed whale and the deepest-diving marine mammal species, for the oil, meat...

Semen cryopreservation (commonly called sperm banking or sperm freezing) is a procedure to preserve sperm cells. Semen can be used successfully indefinitely[citation...

sexually mature and fertile male and female. During sexual intercourse, sperm cells are ejaculated into the vagina through the penis, resulting in fertilization...

penetrated by sperm of other species. In this test, sperm are incubated with several hamster eggs. After seven to twenty hours, the number of sperm penetrations...

Catch the Sperm is a 2001 educational game developed and published by Phenomedia. It was recognized as an entertaining way for health professionals to...

Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. Internal fertilization, unlike its counterpart...

the sperm whale. The organ contains a waxy liquid called spermaceti and is thought to be involved in the generation of sound. In the modern sperm whale...

complex life cycle in which a gamete (haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete...

includes the male reproductive system, which functions to produce and deposit sperm, and the female reproductive system, which functions to produce egg cells...

female gamete is not capable of movement (non-motile). If the male gamete (sperm) is capable of movement, the type of sexual reproduction is also classified...

neutralizing the acidity of the urethra in preparation for the passage of sperm cells. The paired glands are found adjacent to the urethra just below the...

has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals, the penis bears the distal...

giant squid is incompletely known, but data from trawled specimens and sperm whale diving behavior suggest it spans a large range of depths, possibly...

species, males allocate sperm differently due to the Coolidge effect. The allocation is usually according to level of sperm competition, female novelty...

fictional white sperm whale and the main antagonist in Herman Melville's 1851 novel Moby-Dick. Melville based the sperm whale on a leucistic sperm whale of that...

partially artificial means. For artificial insemination, sperm donors may donate their sperm through a sperm bank, and the insemination is performed with the...

ovum has approximately 100,000 times the volume of a single human sperm cell. Sperm cells are motile due to the presence of a tail-shaped structure, the...

partner with a total sperm count (per ejaculate) of 23 million sperm or less. However, across a wide range of observed values, total sperm count (as with other...

Sperm Chromatin Structure Assay (SCSA) is a diagnostic approach that detects sperm abnormality with a large extent of DNA fragmentation. First described...

are made from silicone or polyurethane, as latex is somewhat harmful to sperm. Many men prefer collection condoms to masturbation, and some religions...

(distally). Its primary function is the storage, maturation, and transport of sperm cells. The human epididymis is situated posterior and somewhat lateral to...

develops over the anterior (front) half of the head in the spermatozoa (sperm cells) of humans and many other animals. It is a cap-like structure derived...

composition to semen but has distinct chemical differences. The presence of sperm in the fluid varies from low to absent. Pre-ejaculate functions as a natural...

cells are egg cells, and male reproductive cells are sperm. The male gonad, the testicle, produces sperm in the form of spermatozoa. The female gonad, the...

Teratospermia or teratozoospermia is a condition characterized by the presence of sperm with abnormal morphology that affects fertility in males. The causes of...

does not appear to directly affect sperm health. However, larger volumes of ejaculate may be associated with lower sperm concentration, which can result...

It helps protect the egg, and has an essential role in fertilization by sperm. It is surrounded by the corona radiata. The corona is composed of cells...

produced against sperm antigens. Antisperm antibodies are immunoglobulins of IgG, IgA, and/or IgM, which are directed against sperm antigens. ASA can...

fertilisation (IVF) is a process of fertilisation in which an egg is combined with sperm in vitro ("in glass"). The process involves monitoring and stimulating the...

penis and the scrotum, which contains the testicles that produce semen and sperm, which, as part of sexual intercourse, fertilize an ovum in the female's...

morphologically selected sperm injection (IMSI) is a laboratory technique used for In vitro fertilisation treatments. High-quality sperms are injected into the...

novel by Daniel Kraus about a teenage scuba diver who is swallowed by a sperm whale. Its cover art is by Will Staehle. Jay Gardiner is a teenager living...

whether sperm are successful in fertilizing their eggs or not. It occurs in internally fertilizing species and involves differential use of sperm by females...

Sperm-mediated gene transfer (SMGT) is a transgenic technique that transfers genes based on the ability of sperm cells to spontaneously bind to and internalize...

(1,091 lb), though the largest specimens—known only from beaks found in sperm whale stomachs—may perhaps weigh as much as 600–700 kilograms (1,300–1,500 lb)...

than 5.5 mL. It should not be confused with oligospermia, which means low sperm count. Normal ejaculate when a man is not drained from prior sex and is...

"Every Sperm Is Sacred" is a musical sketch from the film Monty Python's The Meaning of Life. A satire of Catholic teachings on reproduction that forbid...

control, are methods of preventing pregnancy by interrupting the function of sperm. The most commonly used forms of male contraception are condoms, vasectomy...

Zygophyseter is an extinct genus of sperm whale that lived during the Tortonian age of the Late Miocene 11.2 to 7.6 million years ago. The genus contains...

care of the eight premature babies. Suleman's mother stated that a single sperm donor named David Solomon was used to produce the octuplets as well as her...

During a male orgasm, sperm are released from the epididymides and travel via small tubes called the vasa deferentia. The sperm mix with seminal fluid...

zoology, copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into the female's reproductive...

A mating plug, also known as a copulation plug, vaginal plug, sperm plug, or sphragis (Latin, from Ancient Greek: σφραγίς sphragis, "a seal"), is a gelatinous...

Zona pellucida sperm-binding protein 3, also known as zona pellucida glycoprotein 3 (Zp-3) or the sperm receptor, is a ZP module-containing protein that...

pronuclei) denotes the nucleus found in either a sperm or egg cell during the process of fertilization. The sperm cell undergoes a transformation into a pronucleus...

procedure, the vasa deferentia are cut and tied or sealed so as to prevent sperm from entering into the urethra and thereby prevent fertilization of ova...

to the enhanced sperm storage capacity of the epididymis at lower extra-abdominal temperatures than to the testis itself. Greater sperm storage capacity...

The cation channels of sperm also known as Catsper channels or CatSper, are ion channels that are related to the two-pore channels and distantly related...

reproduce by spraying this fluid, which contains the sperm, onto roe (fish eggs). It can also refer to the sperm sacs or testes that contain the semen. Milt (sometimes...

Strandings of sperm whales have occurred across much of their global range. About 60 per cent of the world's recorded sperm whale strandings occur in...

species of fruit fly. Males of this species are known to have the longest sperm cells of any organism on Earth—5.8 cm long when uncoiled, over twenty times...

semen used for sperm donation, and all semen donated through a sperm bank by sperm donors, is produced in this way. The facility at a sperm bank used for...

laying eggs. The eggs are produced by the female in a pair of ovaries. Sperm, produced by the male in one testicle or more commonly two, is transmitted...

been found to impair sperm function, with several of these lubricants being as toxic to sperm in vitro as contraceptive gels. Sperm motility and viability...

Jonathan Jacob Meijer (born 19 May 1981) is a sperm donor, born in the Netherlands. As of April 2023, a Dutch court estimated that Meijer had fathered...

Sperm Whale (Persian: نهنگ عنبر, romanized: Nahang-e Anbar) is a 2015 Iranian comedy film directed by Saman Moghadam and written by Mani Baghbani, with...

for the first time. Inside Jens’ testicles lives a society of sperm cells. A young sperm cell named Simen Sprut is ostracised due to not having any interest...

More recently,[as of?] advanced sperm analyses that examine intracellular sperm components are being developed. Sperm motility increases from puberty...

The issue attracted media attention after a 2017 meta-analysis found that sperm counts in Western countries had declined by 52.4 percent between 1973 and...

working with sea urchins, Hertwig saw and was able to prove that only one sperm entered the ovum and sometime after the two pronuclei fused into one nucleus...

coitus without a condom, sperm enter the vagina, first with the pre-ejaculate and then a larger amount through male ejaculation. Sperm swim through the cervix...

an international initiative to understand the acoustic communication of sperm whales using advances in artificial intelligence. The project has an interdisciplinary...

Brygmophyseter, known as the biting sperm whale, is an extinct genus of toothed whale in the sperm whale family with one species, B. shigensis. When it...

There are fertility-related side-effects to tucking, such as a reduced sperm count. Some types of clothing, such as gaffs and boxers are purposefully...

the spermatozoa show the same abnormality, and over 85% of spermatozoa in sperm have this abnormality. Globozoospermia is responsible for less than 0.1%...

is a series of processes that occur in the oocyte during fertilization. Sperm entry causes calcium release into the oocyte. In mammals, this is caused...

being used, timing is particularly important because donor sperm which is supplied by a sperm bank or a fertility clinic is expensive and it is crucial...

puberty into old age, develop into sperm cells (also known as spermatozoa or male gametes). The developing sperm travel through the seminiferous tubules...

In sperm banks, screening of potential sperm donors typically includes screening for genetic diseases, chromosomal abnormalities and sexually transmitted...

chromosomes of somatic cells and are created by meiosis, with typically a sperm cell fertilizing an egg cell of the same species to create a fertilized...

the whaling ship Pequod, for vengeance against Moby Dick, the giant white sperm whale that bit off his leg on the ship's previous voyage. A contribution...

different in form and composition from the spermaceti organ of the sperm whale. Sperm whales have two large oil-filled sacs, stacked one on top of the other:...

variation of sperm length in passerine birds. Total sperm length can vary from 50 to 300 μm. Several females of passerine species store sperm up to several...

abdomen with his aedeagus and injects his sperm through the wound into her abdominal cavity (hemocoel). The sperm diffuses through the female's hemolymph...

urine samples to determine the presence of spermatozoa. The presence of sperm in urine is referred to as spermaturia. Research on the subject has varied...

Post-copulatory sexual selection involves sperm competition and cryptic female choice. Sperm competition occurs when the sperm of more than one male competes to...

natura rerum (1537) outlines his method for creating homunculi: That the sperm of a man be putrefied by itself in a sealed cucurbit for forty days with...

simple reading of Leviticus 15 indicates that it applies to all sperm flows, including sperm flows due to masturbation. Other than this ritual impurity, no...

Azoospermia is the medical condition of a man whose semen contains no sperm. It is associated with male infertility, but many forms are amenable to medical...

anatomy by the male reproductive system, which includes the testicles, sperm ducts, prostate gland and epididymides, and penis. Secondary sex characteristics...

Major sperm protein (MSP) is a nematode specific small protein of 126 amino acids with a molecular weight of 14 kDa. It is the key player in the motility...

reproduction to affect sperm composition, sperm competition, and ejaculate size. Males of C. lectularius allocate 12% of their sperm and 19% of their seminal...

male sperm for fertilization of the ovum. The major reproductive organs of the male can be grouped into three categories. The first category is sperm production...

a single sperm (90% of the time) or two sperm (10% of the time) combining with an egg that has lost its DNA. In the former case, the sperm reduplicates...

Ari Nagel (1975 or 1976) is an American mathematics professor and a sperm donor who has fathered more than 165 children as of June 2024[update]. He has...

azoospermia (in which sperm is not produced or not produced in enough numbers) and obstructive azoospermia in which the pathway for the sperm (such as the vas...

σπέρμα (spérma), meaning "seed", and -φόρος (-phóros), meaning "bearing", or sperm ampulla is a capsule or mass containing spermatozoa created by males of...

differ in size and/or form. The smaller gamete is male, a microgamete or sperm cell, whereas the larger gamete is female, a larger macrogamete or typically...

Sacred Sperm (Hebrew: זרע קודש) is a 2014 Israeli documentary film directed by Ori Gruder, exploring the taboo of masturbation in Judaism. The TV version...

release matured ova from the ovaries, facilitate their fertilization with sperm, and create a protective environment for the developing fetus during pregnancy...

from the Dutch word traan ("tear drop"). Sperm oil, a special kind of oil found in the head cavities of sperm whales, differs chemically from ordinary...

of sperm cells in the semen). It is associated with infertility. One of the causes of aspermia is retrograde ejaculation, because of that the sperm is...

organism's sperm fertilizes a female organism's egg outside of the female's body. It is contrasted with internal fertilization, in which sperm are introduced...

female preferences, such as the time at which females removed the male's sperm ampulla after mating. Sexual selection by direct and/or indirect benefits...

sperm competition in the very least. Sperm competition is defined as a post copulatory mode of sexual selection which causes the diversity of sperm across...

to produce sperm. Individuals who have been on hormone therapy for an extended period of time have been shown to have a lower total sperm count than males...

haploid embryonic stem cells, which would allow for the development of female sperm and male eggs. In 2004, by altering the function of a few genes involved...

for Germinal Choice, after Nobel laureate Hermann Joseph Muller) was a sperm bank that operated in Escondido, California from 1980 to 1999. The repository...

domestic horses. In 1977, researcher J. Michael Bedford discovered that human sperm could penetrate the protective outer membranes of a gibbon egg. Bedford's...

witnessed corals regenerating. Corals began to eject pink-orange eggs and sperm. The growth of these electrified corals was five times faster than untreated...

reproduction, most sponges are hermaphrodites, they produce both egg and sperm cells. Comb jellies, members of Ctenophora, are radially symmetric and have...

fusion of multiple sperm with one egg. In contrast to the fast block of polyspermy which immediately but temporarily blocks additional sperm from fertilizing...

Ahluwalia in pivotal roles. The concept is set against the background of sperm donation and infertility within a Bengali-Punjabi household. Both Ayushmann...

between sperm and mucus of the cervix. The PCT examines sperm survival in cervical mucus during the pre-ovulatory period and determines whether sperm are...

sex of the zygote is determined by whether the sperm cell contains an X or Y chromosome. If the sperm cell contains an X chromosome, the fetus will be...

male mealworms produced two kinds of sperm, one with a large chromosome and one with a small chromosome. When the sperm with the large chromosome fertilized...

Asthenozoospermia (or asthenospermia) is the medical term for reduced sperm motility. Complete asthenozoospermia, that is, 100% immotile spermatozoa in...

high-finned sperm whale, and the Alula whale. The high-finned sperm whale, or the high-finned cachalot, is an alleged variant or relative of the known sperm whale...

is the fertilization of two or more ova from the same menstrual cycle by sperm from the same or different males, whether through separate acts of intercourse...

April 2011. She is known for her research on environmental contributions to sperm count and the male infertility crisis. Swan was born in Pennsylvania, United...

The Sperm Bank of California (TSBC) is a nonprofit sperm bank in Berkeley, California. It was founded by Barbara Raboy in 1982. It has a program through...

Acrophyseter is a genus of extinct sperm whale that lived in the Late Miocene off the coast of what is now Peru. The genus comprises two species: A. deinodon...

intracytoplasmic sperm injection (ICSI) is performed by an embryologist whereby sperm is injected directly into the egg with a needle rather than allowing sperm to...

known to have the longest sperm cells of any studied organism on Earth, including one species, D. bifurca, that has sperm cells that are 58 mm (2.3 in)...

bones or cartilage. It is most commonly made out of the bones and teeth of sperm whales, the baleen of other whales, and the tusks of walruses. It takes...

reproduction. Because sperm digestion in land slugs reduces the likelihood of a given set of sperm fertilising the partner's eggs, increased sperm investment is...

fertility. Reduced sperm production varies from oligozoospermia, significant lack of sperm, or azoospermia, complete lack of sperm. The mechanism of mutation...

welcomes a child using his frozen sperm. Sethu reveals that the hospital had misplaced their sperm samples, but Sid's sperm had already been used for Shriya's...

sperm fertilizes the egg cell and the other sperm fuses with the two polar nuclei of the large central cell of the megagametophyte. The haploid sperm...

by fishermen, found washed ashore, recovered (in whole or in part) from sperm whales and other predatory species, as well as those reliably sighted at...

California Cryobank is a sperm bank in California, United States, one of the two biggest in the world. There are offices in Palo Alto, Los Angeles, Cambridge...

before fertilization, by preventing sperm from ever reaching the egg. The specific mechanism for preventing sperm from reaching the egg differs by type...

Decapacitation factor (DF) is composed of sperm surface-associated proteins which modulate the fertilizing ability of spermatozoa. Decapacitation is a...

Reversible inhibition of sperm under guidance (RISUG), formerly referred to as the synthetic polymer styrene maleic anhydride (SMA), is the development...

from whale-eating cetaceans, such as Livyatan and other macroraptorial sperm whales and possibly smaller ancestral killer whales (Orcinus), although...

female's egg. Sperm competition selects for both offensive and defensive traits. Offensive sperm competition consists of males displacing sperm from the previous...

dolphin, Risso's dolphin, Long-finned pilot whale, Cuvier's beaked whale, Sperm whale and Fin whale. Their distribution varies greatly from region to region...

twin develops from a separate egg and each egg is fertilized by its own sperm cell. Since identical twins develop from one zygote, they will share the...

Sometimes chromosomal abnormalities arise in the early stages of an embryo, sperm, or infant. They can be caused by various environmental factors. The implications...

issued a fatwa stating that it was permitted to use a third party (donor sperm, ova or surrogacy) in fertility treatments. This was different in "both...

muscle contractions are related to the sensations of orgasm for the male. Sperm are produced in the testes and enter the ejaculatory ducts via the vas deferens...

hybrid cell line made from a zona-free hamster oocyte fertilized with human sperm. It always consists of single cells, and cannot form a multi-cellular being...

doctor to obtain consent from a patient before inseminating her with his own sperm. This normally occurs in the context of people using assisted reproductive...

chemoattractants that activate and guide sperm to the oocyte. The release of chemoattractants is species dependent. For example, sperm in Lytechinus variegatus, the...

transports sperm through the outside, rather than the inside, of the organ. This is structurally different from the human penis, which has sperm travel inside...

(egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during sexual reproduction. A female has larger gametes than a male...

eggs and sperm released or deposited into water by aquatic animals. As a verb, to spawn refers to the process of freely releasing eggs and sperm into a...

environments makes getting sperm to egg much easier for gastropods, while on land, it is much more difficult to get sperm to egg. The majority of gastropods...

(Kogia breviceps) and dwarf (K. sima) sperm whales. As their common names suggest, they somewhat resemble sperm whales, with squared heads and small lower...

contributor to the creation of the child, through sexual intercourse or sperm donation. A biological father may have legal obligations to a child not...

reproduction by helping in the formation of sperms. This molecule is expressed in human male spermatocytes and sperm cells' outer layer. The process of mammalian...

today, an American teenager, has less testosterone than a 68-year-old man. Sperm counts are down 50%." In October 2025, he said that teenage girls are reaching...

parthenogenesis, is a system of asexual reproduction that requires the presence of sperm without the actual contribution of its DNA for completion. The paternal...

Izumo sperm-egg fusion protein 1 (Sperm-specific protein izumo) is encoded in humans by the IZUMO1 gene. In mammalian fertilisation, IZUMO1 binds to its...

generally not inherited but rather occurs as a result of a random event during sperm development. Diagnosis is by a chromosomal analysis, but most of those affected...

Dick (/ˈmɒtʃə dɪk/; died 1838) was an albino (or possibly leucistic) male sperm whale (Physeter macrocephalus) that lived in the southeastern Pacific Ocean...

Drosophila melanogaster embryos, with nine doublets, and Caenorhabditis elegans sperm cells and early embryos, with nine singlets. Additional proteins include...

abdomens. Here, the male passes the sperm to the female's egg-laying tube, which will soon be fertilised by the sperm. Many animals make plugs of mucus...

pilot whales in Peru as well. Orcas also prey on larger species such as sperm whales, grey whales, humpback whales and minke whales. On three occasions...

contraceptive method involves heating the testicles so that they cannot produce sperm. Sperm are best produced at a temperature slightly below body temperature. The...

groups that have a system of indirect sperm transfer along with sperm storage, delayed fertilisation, and sperm competition. Adult males vigorously defend...

her husband, having been artificially inseminated using his stored frozen sperm. The case, which predated the Warnock Report, gave rise to legal discussions...

ability. It acts as a buffer to protect sperm cells from their own toxic byproducts, as well as protecting the sperm from cold shock and osmotic shock during...

since approximately only 50% of males with Klinefelter syndrome can produce sperm. Some degree of language learning or reading impairment may be present,...

serves as a father figure to SpongeBob. He has a teenage daughter, a grey sperm whale named Pearl, who has no interest in taking over the family business...

primates, including women, to encourage her partner to produce good-quality sperm during the mating process. Copulatory vocalizations usually occur during...

means that the sperm from a father provides a second set of 16 chromosomes for a total of 32: one set from each parent. Since all the sperm cells produced...

in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ...

egg giving an XX and the sperm giving an XY. In the case where the sperm is the genetic cause of 48,XXXY syndrome, the sperm would have to contain two...

is any external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial...

Spermworld follows the stories of three sperm donors and their recipients. Inspired by Nellie Bowles' article "The Sperm Kings Have a Problem: Too Much Demand"...

biochemist who specializes in the navigation mechanisms of bacterial and sperm cells. He is a professor emeritus at the Weizmann Institute of Science,...

Division (now the Oregon Department of Transportation) blew up a decaying sperm whale with dynamite to dispose of its rotting carcass. The explosion threw...

prolonging the lifespan of sperm. The prostatic fluid is expelled in the first part of ejaculate, together with most of the sperm, because of the action of...

a giant nematode that parasitizes the placenta and other tissues of the sperm whale. With a length of 8.4 metres (28 ft) and a diameter of 2.5 centimetres...

spermatozoa (sperm) is also cyclic, but unlike the female ovulation cycle, the sperm production cycle is constantly producing millions of sperm daily.[page needed]...

epididymis. The fluid is usually a clear or milky white color and may contain sperm. Spermatoceles are typically filled with spermatozoa and they can vary in...

fertilization by male sperm. Sperm sorting is an advanced technique that sorts sperm "in vitro" by flow cytometry. This shines a laser at the sperm to distinguish...

cells contribute to the formation of the blood-testis barrier and aid in sperm generation. These cells respond to follicle-stimulating hormone, which is...

to CAD. Men with sperm motility defects often have high levels of sperm DNA fragmentation. The degree of DNA fragmentation in sperm cells can predict...

is influenced by the attitudes and sperm donation laws in the host country. There is generally a demand for sperm donors who have no genetic problems...

mammalian males do. Mammalian scrotums lower ambient temperature to keep sperm viable, so cetaceans had to find a way to compensate. And they did. Blood...

is a form of male contraception that blocks sperm transport in the vas deferens, the tubes that carry sperm from the epididymis to the ejaculatory ducts...

male deposits a bundle of sperm, the spermatophore, and the female picks it up and inserts it into her cloaca where the sperm is stored until the eggs...

Greenland whale, fin whale, humpback whale, minke whale, narwhal, pilot whale, sperm whale. As of 2009, 269 species of fish from over 80 different families are...

involves procedures such as in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), and cryopreservation of gametes and embryos, and the use...

using the intended father's sperm and the intended mother's eggs; The embryo is created using the intended father's sperm and a donor egg; The embryo...

the ability to find sperm for assisted reproduction. Assisted reproduction has undergone dramatic advances such that testis sperm are routinely used for...

is a type of sperm motility. Hyperactivated sperm motility is characterised by a high amplitude, asymmetrical beating pattern of the sperm tail (flagellum)...

Sperm-associated antigen 6 is a protein that in humans is encoded by the SPAG6 gene. The correlation of anti-sperm antibodies with cases of unexplained...

in mice requires the contribution of an egg from the female parent and a sperm from the male parent. The first bimaternal mouse was named after a Japanese...

that are inserted in the female or that hold her near her gonopore during sperm transfer"; female genitalia are defined as "those parts of the female reproductive...

levels in the male parent affect the sex ratio of sperm in humans. Maternal influences also impact which sperm are more likely to achieve conception. Human...

women. Males who have fathered large numbers of children through medical sperm donation are difficult to record. Numbers in italics are inexact, particularly...

pathway essential for sperm production. By selectively inhibiting RAR-α, the drug impedes the development and maturation of sperm cells without affecting...

and 1987, Cline sired over 94 children without disclosing himself as the sperm donor to his patients. As of May 11, 2022, Cline has been confirmed as the...

since Zack is infertile. Penny reluctantly agrees to let Leonard donate his sperm. However, when she tries to seduce Leonard despite knowing he has to be...

include sperm competition and cryptic female choice. Sperm competition involves male gametes trying to fertilize eggs first. As a result of sperm competition...

help care for them while the biological parents are busy. This is seen in sperm whales as well. To allow the mother to dive and gather food and resources...

Germinal Choice, a sperm bank for geniuses, in the hope of implementing a eugenics program.[citation needed] Graham created his "Nobel sperm bank" in 1980...

languages.[citation needed] These include the international bestseller Sperm Wars which was based on his own lab's original research on human sexuality...

anchovies, tuna, crustaceans, and shellfish, and is home to many sharks, sperm whales, and whales. The invertebrate fauna is far less inventoried; at least...

or cross-fertilization the sperm is released before the eggs are receptive of the sperm, making it more likely that the sperm will fertilize the eggs of...

(sperm digestion organ) becomes closed off, and the copulatory canal (leading to the sperm storage) is opened. This reconfiguration allows more sperm to...

sperm producing tissue in the testes. For prepubertal boys undergoing cancer treatment who haven't yet begun producing sperm, preservation of sperm itself...

family contains one genus with two species. The dwarf and pygmy sperm whales resemble sperm whales, but are far smaller. They have blunt, squarish heads...

International is a sperm and egg bank in Aarhus, Denmark. Based on the number of available donors, Cryos International is the largest sperm and egg bank in...

coagulum and allows sperm to swim freely. It is also believed to be instrumental in dissolving cervical mucus, allowing the entry of sperm into the uterus...

members visiting a sperm bank in order to make a sperm donation, and skateboarding down a street while wearing white costumes resembling sperm, interspersed...

resulting in the retaining of favorable sperm and making conception more likely. They posited a role of female orgasm in sperm competition. The observation that...

fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. The resulting zygote develops through cell proliferation...

bryophytes) where both sperm and eggs are produced on the same gametophyte, in contrast with dioicy, where each gametophyte produces only sperm or eggs but never...

Sperm-associated antigen 1 is a protein that in humans is encoded by the SPAG1 gene. The correlation of anti-sperm antibodies with cases of unexplained...

samples from collection condoms have higher total sperm counts, sperm motility, and percentage of sperm with normal morphology. For this reason, they are...

pregnant, and dozens of adult children born as a result of his youthful sperm donations have filed a lawsuit to have his identity revealed. Comedy partners...

Otherwise, the sperm-specific protein IZUMO1, a member of the immunoglobulin superfamily, has also been identified as the only sperm membrane protein...

large penis length and girth include a sperm competition hypothesis and a mate competition hypothesis. The sperm competition hypothesis does not have much...

increased male age is associated with a decline in semen volume, sperm motility, and sperm morphology. In studies that controlled for female age, comparisons...

are the reproductive organs of the plant, they mediate the joining of the sperm, contained within pollen, to the eggs in the ovules—contained in the ovary...

Male Turf Horse. When Secretariat first retired to Claiborne Farm, his sperm showed some signs of immaturity, so he was bred to three non-thoroughbred...

fox, and the pool frog. The largest predator in Norwegian waters is the sperm whale, and the largest fish is the basking shark. The largest predator on...

during normal Zoo hours. Xin Xin is artificially inseminated annually with sperm from Chinese panda Ling-Ling as part of a continuing effort to breed pandas...

pathology of anejaculation.[citation needed] The first-line method for sperm retrieval in men with spinal cord injury is penile vibratory stimulation...

Spermicide is a contraceptive substance that destroys sperm, inserted vaginally prior to intercourse to prevent pregnancy. As a contraceptive, spermicide...

references to sperm and conception", without any explicit sexual acts, nudity or violence. Žák, Miroslav (15 January 2026). "BECOME: A Sperm's Journey – česká...

Aulophyseter is an extinct genus of sperm whales from the subfamily Physeterinae that existed during the Miocene. Fossils of Aulophyseter have been found...

ready-made spermatophores (packages of sperm), but spin small sperm webs onto which they ejaculate and then transfer the sperm to special syringe-styled structures...

Sperm-associated antigen 8 is a protein that in humans is encoded by the SPAG8 gene. The correlation of anti-sperm antibodies with cases of unexplained...

Bateman as a 30-something single woman who decides to have a child using a sperm bank. The film's opening weekend drew what The Hollywood Reporter dubbed...

whale, but sperm whales have been captured with tentacle marks 18 inches [46 cm] across." L. Harrison Matthews's monographic treatment of the sperm whale,...

store more sperm from gift-giving males suggesting that sperm storage is under female control through cryptic sperm choice. The increase in sperm storage...

testing and in order to use sperm for intrauterine insemination or in vitro fertilization the couple must first collect a sperm sample. For many religious...

Female birds have sperm storage tubules that allow sperm to remain viable long after copulation, a hundred days in some species. Sperm from multiple males...

grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects...

winner of the series was "Stephen's Life". The runner up was "The Sperm Donor". "The Sperm Donor" was written by Mark Treitel and Shoe Schuster and directed...

research suggests that older males have decreased semen volume, sperm motility, and impaired sperm morphology. In studies that controlled for female partner's...

protein fibers, with protein receptors needed for sperm binding which, in turn, are bound to sperm plasma membrane receptors. The species-specificity...

referred to his biological parents as "my sperm and egg bank. That's not harsh, it's just the way it was, a sperm bank thing, nothing more." I always thought...

during the luteal phase, the egg will be available to be fertilized by sperm. If it is not, it will break down in less than a day. Meanwhile, the uterine...

testes which contribute to the process of spermatogenesis (the production of sperm) as a structural component of the seminiferous tubules. They are activated...

0066. ISSN 1471-2970. PMC 9939265. PMID 36802778. "Sperm in Competition II: Sperm Morphology". Sperm Competition and Its Evolutionary Consequences in the...

chromosomes an individual receives. An offspring formed from the union of a sperm and an egg develops as a female, and an unfertilized egg develops as a male...

New Zealand Aids Foundation and Positive Women Inc launched a sperm bank called Sperm Positive for HIV-positive people to donate. This is the first of...

contract intermittently, which has the effect of stimulating ejaculation of sperm, followed by prostatic fluid, as well as maintaining the swelling of the...

not optimally conductive for sperm production. The testicles are outside the body for cooling because they operate for sperm production at a slightly lower...

point in time. They now serve as storage units for sperm, where a female can introduce the stored sperm to her eggs when she finds it optimal. It is this...

environmental factors in their sexual reproduction. The breeding system, or how the sperm from one plant fertilizes the ovum of another, depends on the reproductive...

in animals, female and male gametes are called, respectively, eggs and sperm. In extant land plants, either the sporophyte or the gametophyte may be...

sperm-attracting substances. In fertilization, the sperm passes through the follicle cells and binds to glycosides on the vitelline coat. The sperm's...

in the haploid phase of spermatogenesis and are believed essential for sperm head condensation via genomic DNA compaction and stabilization. They may...

Fertilization occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form...

during incubation with multiple sperm cells in culture, or via intracytoplasmic sperm injection (ICSI), where sperm is directly injected into the oocyte...

clavipes males produce a limited amount of sperm over their lifetimes. Thus, sometimes a male will only have enough sperm for a single mating, forcing the male...

Sperm-associated antigen 7 is a protein that in humans is encoded by the SPAG7 gene. GRCh38: Ensembl release 89: ENSG00000091640 – Ensembl, May 2017 GRCm38:...

fertility doctor who drunkenly inseminates herself with her ex-boyfriend's sperm. The series has had two seasons (2022 and 2024), each with six episodes...

attraction there. He received worldwide fame when he rescued two pygmy sperm whales in March 2008. A year later, he trapped a woman out at sea. At the...

sperm in order to repair the brain" "returning the essence to replenish the brain" "returning the semen to supplement the brain" "returning the sperm...

the biological production of offspring. It is said that he originated "spermism", the doctrine that fathers contribute the essential characteristics of...

parthenogenesis can mean the development of an embryo from either an individual sperm or an individual egg. Parthenogenesis occurs naturally in some invertebrate...

5 2025 Love Thy Nader Guest star; Episode 6: "Sex, Swimwear and Salmon Sperm" Films 2013 Tom & Issy Issy Short film 2014 Ellie Goulding: Healthy Eating...

located in the hilum of the testicle (mediastinum testis) that carries sperm from the seminiferous tubules to the efferent ducts. It is the homologue...

pollination, via motile sperm, as in cycads, ferns, mosses, and algae. The sperm are large (about 70–90 micrometres) and are similar to the sperm of cycads, which...

that can be used as a more accurate indicator of an animal's intelligence. Sperm whales (Physeter macrocephalus) have the largest known brain mass of any...

after the ovulation of the Graafian follicle. For fertilization to occur, sperm cells rely on hyaluronidase (an enzyme found in the acrosome of spermatozoa)...

TESE-ICSI technique for extracting sperm from men with low or nonexistent sperm counts and direct injection of the sperm into the egg. Silber graduated medical...

sperm donor visitation rights to a child born via artificial insemination. The case has been viewed as a victory by advocates for the rights of sperm...

that a donor's sperm may be used. Some countries have laws limiting the number of children a donor can father, while others limit sperm donations based...

paternal sperm could increase the likelihood of autism in offspring. In 2019, a study at the University of California, San Diego, using sperm sequencing...

chromosome. Deletions in this region are associated with inability to produce sperm. Subregions within the AZF region are AZFa (sometimes AZF1), AZFb and AZFc...

so sperm competition could be an important aspect of male–male competition for being reproductively successful. Males have a limited number of sperm and...

human–chimpanzee hybrid by inseminating three female chimpanzees with human sperm. Ilya Ivanovich Ivanov was born in the town of Shchigry, Russia. He graduated...

insemination or in vitro fertilization, whether done using sperm or ova stored before a parent's death or sperm retrieved from a man's corpse, has created new legal...

equivalent amount of sperm in both pouches surrounding their seminal receptacles. They also observed a gradual decrease in the quantity of sperm during the reproductive...

of New Zealand, and subsequently mentioned in Melville's discussion of sperm whales in Moby Dick (Chapter 45: "The Affidavit"). Pearl Krabs from SpongeBob...

extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale respiratory system...

extant and two extinct species from the Neogene: Pygmy sperm whale, Kogia breviceps Dwarf sperm whale, Kogia sima †Kogia pusilla, Italy, Middle Pliocene...

the process in which sperm cells are produced and formed into mature spermatozoa from spermatogonia. Males mature spermatozoa (sperm) are produced to later...

mate a female more than once. The separation presumably helps to keep the sperm count high for each mating and also helps to keep the condition of the female...

rates, increasing female fitness. Sperm competition that arises from polygamy favors males with faster, more motile sperm in higher numbers, increasing male...

conceived through artificial insemination using frozen sperm. The technique for freezing the sperm in liquid nitrogen was first developed in 1980 and the...

made his feature film debut with the romantic comedy Vicky Donor, about sperm donation, which received critical acclaim and performed strongly at the...

she cannot wait any longer. She also wants a face-to-face sperm donor, disdaining using a sperm bank. Wally suggests he be the donor, but Kassie believes...

on sperm whale skin. (Alphabetical by author) In Book 27 (The Exposed) of K. A. Applegate's Animorphs book series, Rachel and Tobias morph into sperm whales...

command of Captain George Pollard Jr., the ship was attacked and sunk by a sperm whale. About 2,000 nautical miles (3,700 km) from the coast of South America...

sex is greatly reduced, as anal sex alone cannot lead to pregnancy unless sperm is somehow transported to the vaginal opening. Because of this, some couples...

the sperm, resulting in clonal reproduction for the males. This is required because the queen can only produce (female) worker ants using sperm from...

(conducted on the sperm and eggs of mice) singled out a particular molecule on the egg coat which binds the sperm. This molecule was called a "sperm receptor"...

gynogenesis, which is sperm-dependent parthenogenesis. This means that females must mate with a male of a closely related species, but the sperm only triggers...

almost always comes from a sperm cell. Nondisjunction may cause a sperm cell to gain two extra sex chromosomes, resulting in a sperm cell with three sex chromosomes...

attempts to prevent rivals from removing his sperm and inserting their own, a form of sperm competition (the sperms of the last mated male have the greatest...

Father Was a Sperm Donor". E!. Retrieved October 23, 2023. Handel, Erica (September 2, 2022). "RHONY: How Allyson Shapiro Found Out Her Sperm Donor Was Mixed...

white-uniformed sperm are dispatched paratrooper-style into the great unknown. Woody Allen as Victor / Fabrizio / The Fool / Sperm John Carradine as...

sperm after mating. More sperm is stored by the first mating, which leads to less sperm stored in subsequent matings. However, amount of stored sperm...

sex segment. Testes produce sperm that are transported by epididymis to the vas deferens, which then transfer the sperm to hemipenes. These snakes have...

wrong sperm. In January 2013, Barwin admitted to professional misconduct in regards to four women who were artificially inseminated with the wrong sperm. A...

of toothed whales. There is only one living species in this genus: the sperm whale (Physeter macrocephalus). Some extremely poorly known fossil species...

located on the human sperm surface and inner acrosomal membrane. This multifunctional protein is a hyaluronidase that enables sperm to penetrate through...

animals that were caught by fishermen, recovered (in whole or in part) from sperm whales and other predatory species, as well as those credibly sighted at...

separated in May 2012. Schreiber's attorneys argued that Patric was merely a sperm donor, as Schreiber and Patric had not married and the conception of the...

Rademaker A, Martin R (August 2001). "Cigarette smoking and aneuploidy in human sperm". Molecular Reproduction and Development. 59 (4): 417–21. doi:10.1002/mrd...

in testicular haploid germ cells encodes a protein that is recognized by sperm-agglutinating antibodies and implicated in infertility. SPAG9 is a potential...

free dictionary. Spawn or spawning may refer to: Spawning, the eggs and sperm of aquatic animals Spawn (character), a fictional character in the comic...

performance was poor. They use palpal inflations to determine sperm count, and if the female deems the sperm count too low, she will consume the male. In Latrodectus...

the developing sperm. The second cell type is the cells belonging to the spermatogenic cell lineage. These eventually develop into sperm cells (spermatozoon)...

it comes in contact. It is later revealed that Vought used Soldier Boy's sperm to create Homelander without his knowledge (he was told to provide a sample...

other invertebrates and vertebrates. Its purpose is to receive and store sperm from the male or, in the case of hermaphrodites, the male component of the...

cells in sexually-reproducing organisms that produces the gametes, the sperm or egg cells. It involves two rounds of division that ultimately result...

consumption of soy phytoestrogens and testosterone or estrogen levels, or sperm quality. Soy products contain high amounts of phytoestrogens. As they are...

the hypothesis, male (Y) sperm are faster but more fragile than female (X) sperm. Further, acidic environments harm Y sperm, according to the theory,...

vagina (such as intercrural sex or other genital-genital rubbing) where sperm can be deposited near the entrance of the vagina and can travel along the...

mammals. In insects, male accessory glands produce products that mix with the sperm to protect and preserve them, including seminal fluid proteins. Some insecticides...

small "sperm web", constructed for this sole purpose. The male moves to the underside of the sperm web and takes up the sperm into the sperm ducts of...

female being three times in 35 days. Aspects of sperm competition such as sperm displacement and sperm precedence have been observed in the species. In...

group. Bizarrely, it is also known for having approximately 23 mm long sperm, 10 times the length of the male's body. Drosophila hydei are commonly found...

division to produce immature sperm or spermatids. These spermatids undergo spermiogenesis in order to develop into sperm. LH, FSH, GnRH, and androgens...

The sperm–cervical mucus contact test is an in-vitro slide test used for detecting antispermal antibodies. It is one of the investigations done for infertility...

The creation of transgenic animals also leads into the study of altering sperm cells with exogenous DNA. In 1928, bacteriologist Fredrick Griffith observed...

positions. Pregnancy is a potential result of any form of sexual activity where sperm comes in contact with the vagina; this is typically during vaginal sex,...

produce sperm, which is delivered to the female via the Aedeagus. Although in some insects, such as Bed bugs, the male can inject his sperm directly...

is inserted into the vagina, so it can cover the cervix and prevent any sperm from entering the uterus. Secondly, the sponge contains spermicide. The...

Pregnancy generally requires fertilisation of a woman's egg cells with a man's sperm cells. Humans are similar to other large mammals in that they usually give...

by fishermen, found washed ashore, recovered (in whole or in part) from sperm whales and other predatory species, as well as those reliably sighted at...

Italian for "monster") and is portrayed as an aggressive and man-eating sperm whale, in contrast with the "gentle giants of the sea" in real life, with...

structure, with mothers heading the pod instead of the father, like in sperm whales and pilot whales. Different populations around the world have different...

diver searching for his father's remains in the ocean is swallowed by a sperm whale, leaving him an hour to find a way to escape. Austin Abrams as Jay...

Island of New Zealand. The company offers marine wildlife tours focussing on sperm whales and other cetaceans, using vessels operating from the marina at South...

the mechanisms of sperm competition in birds. He provided some of the first evidence of: cryptic female choice in birds; strategic sperm allocation, and...

CatSper, Izumo, sperm associated antigen 9 (SPAG9), 80 kilodalton human sperm antigen (80 kDa HSA), and nuclear autoantigenic sperm protein (tNASP)....

meaning sperm is required to fertilize their eggs, but the male gamete does not contribute any DNA to the embryo. Females lay eggs and then "steal" sperm from...

their sperm in the L4 stage (150 sperm cells per gonadal arm) and then produce only oocytes. The hermaphroditic gonad acts as an ovotestis with sperm cells...

followed by cellular differentiation into mature gametes, either eggs or sperm. It is debated whether primordial germ cells can also originate from the...

Scaldicetus is an extinct genus of highly predatory macroraptorial sperm whale. Although widely used for a number of extinct physeterids with primitive...

extremely small sperm. Their heads are 6–7 μm, long, The midpiece is as long as the head, and tapers to a flagellum 45–50 μm long. This sperm is the most...

sperm or have it stored for future use must make six sperm deposits for every one child they wish to have, due to the 50% survival rate of the sperm in...

considered to restore sperm flow. Other, more subtle findings that can be observed in the fluid—including the presence of sperm fragments and clear, good...

gametes. One gamete from the female (egg) and one gamete from the male (sperm) is used for fertilization. Copulation is the union of the sex organs of...

GPI-anchored to the plasmalemma of the mammalian egg cell that recognizes its sperm-riding counterpart, IZUMO1, and facilitates fertilization. The protein was...

explanations are the known increase in the number of mutations in older sperm and the hypothesis that men marry later if they carry a genetic predisposition...

rites. Fijians developed a monetary system where the polished teeth of the sperm whale, called tambua, became an active currency. A type of writing existed...

in 1694 studied sperm under a microscope and the diagram he proposed for what sperm was, a homunculus in the head of the human sperm. A very little human...

number (n) refers to the total number of chromosomes found in a gamete (a sperm or egg cell produced by meiosis in preparation for sexual reproduction)...

Cetacea can be split into whales (cetaceans more than 10 m long such as sperm and most baleen whales) and dolphins and porpoises (all Odontocetes less...

J.; Madgar, Igael (2006-11-01). "Posthumous sperm retrieval: analysis of time interval to harvest sperm". Human Reproduction. 21 (11): 2890–2893. doi:10...

offspring, or donor-conceived person (DCP), is conceived via the donation of sperm (sperm donation) or ova (egg donation), or both (either from two separate donors...

with his own sperm. Finally, there was Abhinaya, who learned from Gaurav's partner John Matthew that Tulsi lied about using Aravind's sperm and instead...

optimum time for fertilization, that it may not enter the fallopian tube, sperm may not be able to reach the egg, fertilization may fail to occur, transport...

and gamergates are restricted to taxa where the workers have a functional sperm reservoir ('spermatheca'). In some species, gamergates reproduce in addition...

at the Ocean Institute in Dana Point, California. Pearl is an adolescent sperm whale who lives in a hollow anchor with her father Eugene "Mr." Krabs, the...

cause numerous adverse human health outcomes, including alterations in sperm quality and fertility; abnormalities in sex organs‚ endometriosis‚ early...

aedeagus, which transfers sperm into the female's bursa copulatrix. During copulation, sperm is not directly deposited into sperm-storing organs. Ejaculation...

List of singles, with selected chart positions Title Year Peak chart positions AUS "When I Was a Sperm" 1995 26...

medical term used for the tissue derived from the union of an egg and a sperm. It encompasses anembryonic gestation (blighted ovum) which does not have...

the countryside near Strathblane was used for the Zulu War; and "Every Sperm Is Sacred" was shot in Colne, Lancashire, with interiors done at Elstree...

heterogamous—females producing larger gametes (ova) and males producing smaller gametes (sperm). In nearly all animal species that give live birth, offspring are carried...

Sperm flagellar protein 2 is a protein that in humans is encoded by the SPEF2 gene. SPEF2 plays an important role in spermatogenesis and flagellar assembly...

Bonaparte became known for two works: "feely of the gorillas' wedding", and "Sperm Whale's Love-life". He had already made a name for himself but still seeks...

internal fertilization, but this is sometimes by indirect transfer of the sperm via an appendage or the ground, rather than by direct injection. Aquatic...

risk. Fellatio cannot result in pregnancy, as there is no way for ingested sperm to reach the uterus and fallopian tubes to fertilize an egg cell. At any...

sharks, sperm has been detected in both maturing and mature females. They can store sperm up to one year prior to first ovulation. The sperm is stored...

neotenic fire salamanders. In captivity, females may retain sperm long-term and use the stored sperm later to produce another clutch. This behavior has not...

Surgical sperm retrieval is an alternative means of semen collection, where other means are not possible in circumstances like posthumous sperm retrieval...

male sperm precedence. Patterns of sperm use by the females determine the benefits of resource defence for males. If the female uses only the sperm from...

by Hannah Olson, which follows Quincy Fortier, a doctor who used his own sperm to inseminate fertility patients. Heidi Ewing and Rachel Grady were executive...

to open the vulva of females and facilitate the transmission of sperm, although sperm is not transferred directly by or through the spicules. The gubernaculum...

Sperm Whales: Social Evolution in the Ocean. Chicago: University of Chicago Press. pp. 135–141. ISBN 978-0-226-89518-5. Hal Whitehead (2024). "Sperm whale...

whales and their anatomy occur in seventeen other chapters, including "The Sperm Whale's Head -- Contrasted View" (Chapter 74) and "The Right Whale's Head...

Kogiidae (small sperm whales) Genus: Kogia Pygmy sperm whale, Kogia breviceps DD Dwarf sperm whale, Kogia sima DD Family: Physeteridae (sperm whales) Genus:...

agreement, Mary Beth Whitehead would be inseminated with William Stern's sperm (making her a traditional, as opposed to gestational, surrogate), bring...

contractions during orgasm can increase the chances of pregnancy as they transport sperm up the reproductive tract from the vagina to the oviducts, which decreases...

reproductive biology of Aegla (Crustacea: Anomura: Aeglidae) with observations on sperm structure". Memoirs of Museum Victoria. 60 (1): 63–70. doi:10.24199/j.mmv...

changed between their self-titled debut, Oomph! (1992), and its successor Sperm (1994). Though they started with very much a dance-laden industrial sound...

which differentiate through meiosis to sperm cells. Sertoli cells function to nourish the developing sperm cells. They secrete androgen-binding protein...

Motile sperm domain containing 2 is a protein that in humans is encoded by the MOSPD2 gene. It is an endoplasmic reticulum–resident protein involved in...

which independently has evolved multiflagellated sperm cells with approximately 20 flagella (sperm flagella in other vascular plants can count at least...

One of the centrioles of the cell elongates to become the tail of the sperm. A temporary structure called the "manchette" assists in this elongation...

leads Project CETI, an initiative for understanding the communication of sperm whales. Gruber was born in Paterson, New Jersey, and received his B.S. at...

storage time of sperm within the female is associated with negative survival outcomes and hatching, possibly due to sperm age. Sperm is specifically stored...

of barrier contraception. A cervical cap fits over the cervix and blocks sperm from entering the uterus through the external orifice of the uterus, called...

all cells. The extra chromosome is provided at conception as the egg and sperm combine. Translocation Down syndrome involves attachment of extra chromosome...

Siphonogamy is a condition in which non-motile sperm are transported to the egg through a microscopic pollen tube. The innovation is universal among seed...

engage in oral sex for contraception reasons. For conception to take place, sperm from the penis must enter the uterus and fallopian tubes and fertilize the...

grammar Sperm-associated antigen, human proteins, including: SPAG1: Sperm-associated antigen 1 SPAG5: Sperm-associated antigen 5 SPAG6: Sperm-associated...

Zona pellucida sperm-binding protein 2 is a protein that in humans is encoded by the ZP2 gene. The zona pellucida is an extracellular matrix that surrounds...

her mother Sarah. She confronts her mother and is told her Mom used donor sperm to get pregnant with her because she couldn't get pregnant by her husband...

Lukas, J.; Stover, J.; Snodgrass, K. & Wildt, D. E. (1992). "Correlation of sperm viability with gamete interaction and fertilization in vitro in the cheetah...

9 February 2026. "Former OpenAI board member says Elon Musk offered her sperm donations". www.bbc.com. 6 May 2026. Retrieved 7 May 2026. Li, Laura Italiano...

constitute the reproductive structures of the colony, dispersing eggs or sperm. Physalia utriculus is distinguished from the Portuguese man o' war (Physalia...

chelicerae. Male spiders have specialized pedipalps that are used to transfer sperm to the female during mating. Many species of spiders exhibit a great deal...

Orycterocetus is an extinct genus of sperm whale from the Miocene of the northern Atlantic Ocean. It is thought to have been similar in size to Acrophyseter...

strong social disapproval. This was true even when using the husband's sperm, a process known as artificial insemination by husband, or AIH. Artificial...

Burnett Foundation Aotearoa and Positive Women Inc launched a sperm bank called Sperm Positive for HIV-positive people to donate. This is the first of...

by sperm. After ovulation, the character of cervical mucus changes, and under the influence of progesterone it becomes thick, scant, and tacky. Sperm typically...

the inability of the sperm to move even when alive. To check for necrospermia, samples with a high percentage of immobile sperm are stained to check for...

and genital pores. When mating, two individual earthworms will exchange sperm and fertilize each other's ova. Depending on the species, an adult earthworm...

Sperm-associated antigen 11B is a protein that in humans is encoded by the SPAG11B gene. This gene encodes several androgen-dependent, epididymis-specific...

pore, on the ninth abdominal segment. This process is called intra-male sperm translocation (ST). Because the male copulatory organ has evolved independently...

exception of Rick and Morty. The Sperm Queen uses Morty to create more sperm monsters before they are rescued by a friendly sperm Morty names Sticky. Eventually...

dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps) Dwarf sperm whale (K. simus) Iniidae Inia...

even the megafaunas of the oceans; various types of whales (such as fin, sperm, and pilot) and dolphins can be found in the area. Most of Catalonia belongs...

inspired many depictions of the sperm whale in literature and later in film. In 1940 Walt Disney's Pinocchio, the giant sperm whale Monstro has many characteristics...

genome. Each sperm or egg cell possesses a random selection of genes from its mother or father. While not the most probable event, a sperm or egg may randomly...

(ova), and smaller motile microgametes are sperm (spermatozoa, spermatozoids). The degree of motility of the sperm may be very limited (as in the case of...

short-finned pilot whale, and whales such as Bryde's whale, sei whale, fin whale, sperm whale, and beaked whales can be spotted near the coast or offshore. Electricity...

specifically the ligand bourgeonal, was once thought to attract mammalian sperm. The 2003 discovery of this phenomenon prompted research into odour reception...

over 3–5 seconds when the male joins its cloaca with the female's, passing sperm to fertilize the female's eggs. Hummingbird females build a nest resembling...

including cervical caps and cervical diaphragms, preventing the passage of sperm through the cervix. Other approaches include methods that observe cervical...

needed] Non-genetic defects in sperm cells, such as deformed centrioles and other components in the tail and neck of the sperm which are important for the...

whale and the second largest living species of toothed whale after the sperm whale. Baird's beaked whale was first described in 1883 by American zoologist...

females mate many times before conception, males have large testicles for sperm competition. Males may exist in a dominance hierarchy and those at the top...

with sperm cells as a tool for male infertility diagnosis. To break down these tightly bound protamine proteins in order to use the comet for sperm, additional...

Matsuura played drums with The Big Pink and has a side project called Sperm Javelin. Matsuura met her partners in The Big Pink while attending art school...

hemipenes do not have a completely enclosed channel for the conduction of sperm, but rather a seminal groove that seals as the erectile tissue expands....

attempts to induce gynogenesis, a type of parthenogenic reproduction where a sperm cell must be present to trigger embryogenesis but does not genetically contribute...

microgametopgyte is composed of three cells, the vegetative cell and two sperm cells, while in gymnosperms there can be three or more cells depending on...

Superfamily Physeteroidea (sperm whales) Family Kogiidae, 2 species (pygmy and dwarf sperm whales) Family Physeteridae, 1 species (common sperm whale) Superfamily...

and development of the corpus luteum. In the absence of fertilization by sperm, the corpus luteum degenerates leading to a decrease in progesterone and...

who resided at SeaWorld San Diego, was artificially inseminated using his sperm. She gave birth to Tilikum's son, Nakai, on September 1, 2001. On May 3...

would carry out two methods of impregnating women - the first, to steal the sperm out of a dead man and deliver it into a woman. If a demon could extract...

and viruses, and for treating male subfertility through intracytoplasmic sperm injection (ICSI, /ˈɪksi/ IK-see). The use of microinjection as a biological...

he attended George Mason University (Virginia), Hatch donated his sperm to a sperm bank in Fairfax, Virginia, hundreds of times total for two years, twice...

require sperm from a co‑occurring, related species to fertilize their eggs and initiate development. Usually the eggs then discard the sperm genome and...

March 5, 2021) was an American former fertility doctor who used his own sperm to impregnate his patients without informing them. Jacobson was born in...

of any donor sperm, motivated by a risk of variant Creutzfeldt–Jakob disease, inhibiting the once popular import of Scandinavian sperm. Despite this...

longer to achieve sperm production. In these cases, assisted reproductive technology, such as sperm retrieval using testicular sperm extraction (TESE)...

complex, males can contribute sperm to support reproduction through kleptogenesis, a system in which hybrid females use the sperm to trigger egg development...

accounting for over 80% of the weight of sperm-whale-stomach contents off Iberia, and 97% of sampled sperm whales in the Tasman Sea had consumed this...

'precious regurgitations' of sperm whales. The Grimaldi scaled squid was first collected from the stomach contents of a sperm whale. It is a widely distributed...

(Figure 1). The epididymis is the primary sperm storage organ in male reptiles. In all reptiles and mammals the sperm storage region of the epididymis can...

giving a total length of 14–16 m (46–52 ft), which is consistent with sperm whales; but also, spiny and sharp, which could stem from whale barnacles;...

conceived via sperm donation, he has also promoted the need for more men to become sperm donors and is currently pursuing becoming a sperm donor himself...

It also stated that Jackson impregnated Rowe artificially with his own sperm cells. Further reports alleged that the relationship was an "economic" one...

nominations for the Academy Award for Best Supporting Actor for playing a sperm donor in The Kids Are All Right (2010), Dave Schultz in Foxcatcher (2014)...

in the development of strong sperm competition, because small sperm enable organisms to produce a large number of sperm, and make males (or male function...

shown to occur within the medial prefrontal cortex (mPFC), testes, and sperm of cocaine-addicted male rats. These epigenetic alterations in the rat mPFC...

functional sets of both male and female organs, and thus can produce both sperm and ova, which is extremely rare in humans. Enlargement of one or both breasts...

sufficient to cause the disease. Because the rate of mutation is higher in sperm cells, males are more likely to transmit expanded HTT alleles to their offspring...

can eventually replace him with Homelander, who had been conceived with sperm obtained from Soldier Boy. Throughout, Noir complained about having to wear...

is their primary sperm donor. Lee wrote that he was appalled by SeaWorld's "sick and twisted" methods for obtaining Tilikum's sperm. Lee concluded that...

in males. In males, sperm is stored in organs called pedipalps. As male P. mira transfer approximately the same amount of sperm from pedipalps per insertion...

the author of The Genius Factory: The Curious History of the Nobel Prize Sperm Bank (2005) about the Repository for Germinal Choice, and Good Book: The...

This species exhibits a high first-male sperm precedence, so providing a virgin female with a large sperm quantity is advantageous. Because there is...

dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps) Dwarf sperm whale (K. simus) Iniidae Inia...

other animals to their mutual benefit. Sea anemones breed by liberating sperm and eggs through the mouth into the sea. The resulting fertilized eggs develop...

azoospermia) is due to functional obstruction of sperm transport down the genital tract at the epididymis, where the sperm is found in viscous, lipid-rich fluid...

of the vasa deferentia contract reflexively in peristalsis, propelling sperm from the testicles to the urethra. The earthworm is a limbless annelid worm...

Sperm Bank — George Herman (episode host Seth Rogen) and Eugene Sons (Kenan Thompson) announce a going-out-of-the-business sale at "the oldest sperm bank...

receive and store sperm, manipulate sperm from different males, and lay eggs. Accessory glands produce substances to maintain sperm and to protect the...

family. The encoded protein is localized to the sperm flagellum and may be involved in the regulation of sperm motility. Alternative splicing of this gene...

known as "The Genius Sperm Bank"). Ramm was conceived from the Repository for Germinal Choice, otherwise known as the Genius Sperm Bank. Born in Roosevelt...

of gray whales, sei whales, fin whales, bowhead whales, Bryde's whales, sperm whales and humpback whales. Recent scientific surveys estimate a population...

Phocoenidae (porpoises), as well as the more distant families Physeteroidea (sperm whales) and Ziphiidae (beaked whales). Dolphins range in sizes from the...