A sperm which contains an X chromosome, produced in the usual way in the testicles, referring to the occurrence of such a sperm fertilizing an egg and giving birth to a female.[1]
A sperm which artificially contains genetic material from a female.[2]
Since the late 1980s, scientists have explored how to produce sperm where all of the chromosomes come from a female donor.[3]
^"Groundbreaking new sperm sorting method could let parents chose sex of their baby". The Independent. 2019-08-14. Retrieved 2022-03-20.
^"Color illustration of female sperm making procress" (PDF). Human Samesex Reproduction Project. Retrieved 2013-11-09.[dead link]
^"BIBLIOGRAPHY and TIMELINE". Human Samesex Reproduction Project.
Femalesperm 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...
Femalesperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily...
(forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm with a tail known as a flagellum, which...
extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal...
toxic seminal substances to reduce female re-mating tendencies to cope with sperm competition. Offensive tactics of sperm competition involve direct interference...
fertilize a single ovum. Sperm competition occurs between sperm from two or more rival males when they make an attempt to fertilize a female within a sufficiently...
obvious[clarification needed] approaches, subject to a growing amount of activity, are femalesperm and male eggs. In 2004, by altering the function of a few genes involved...
Sperm donation is the provision by a man of his sperm with the intention that it be used in the artificial insemination or other "fertility treatment"...
Spallanzani 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...
in size and/or form. The smaller gamete is male, a sperm cell, whereas the larger gamete is female, typically an egg cell. Anisogamy is predominant among...
male one). The term is used when the female gamete is not capable of movement (non-motile). If the male gamete (sperm) is capable of movement, the type of...
uterus also produces secretions, which help the transit of sperm to the fallopian tubes, where sperm fertilize ova (egg cells) produced by the ovaries. The...
sperm are successful in fertilizing their eggs or not. It occurs in internally-fertilizing species and involves differential use of sperm by females when...
body the sperm's survival likelihood is reduced and it may die, thereby decreasing the total sperm quality. Sperm cells come in two types, "female" and "male"...
of sperm into a female's reproductive system for the purpose of impregnating, also called fertilizing, the female for sexual reproduction. The sperm is...
male inserts their erect penis into the female's vagina and ejaculates semen, which contains sperm. The sperm then travels through the vagina and cervix...
and the female has the ability to influence when egg fertilization occurs. While the exact mechanism of how the female controls the stored sperm to fertilize...
the idea of femalesperm became more of a reality. In 1997, scientists partially confirmed such techniques by creating chicken femalesperm in a similar...
Sperm sorting is a means of choosing what type of sperm cell is to fertilize the egg cell. Several conventional techniques of centrifugation or swim-up...
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...
and minimise sperm competition. Sperm competition is where the sperm of two males simultaneously occupy the reproductive tract of a female and they compete...
male reproductive system which functions to produce and deposit sperm; and the female reproductive system which functions to produce egg cells, and to...
allocate sperm differently due to the Coolidge effect. The allocation is usually according to level of sperm competition, female novelty, and female reproductive...
Placentonema gigantissima is a giant nematode that parasitizes the placenta of the sperm whale. With a length of 8.4 metres (28 ft) and a diameter of 2.5 centimetres...
including humans. It is homologous to the female ovary. The functions of the testicles are to produce both sperm and androgens, primarily testosterone. Testosterone...
organism's sex is female (symbol: ♀) if it produces the ovum (egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during...
The dwarf sperm whale (Kogia sima) is a sperm whale that inhabits temperate and tropical oceans worldwide, in particular continental shelves and slopes...
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