Female Sperm

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Jillian O Keeffe
Last Modified Date: January 24, 2021
Female sperm can refer to those that carry an X chromosome and, after fertilization, result in a female baby, but it can also refer to the theoretical concept of making sperm from female cells instead of male cells. While female sperm are not yet scientifically achievable as of 2011, scientists have managed to make sperm-like structures from stem cells. If sperm are able to be engineered from stem cells, then stem cells from a woman may be suitable as the basis for this technique. Female sperm could therefore result in a baby that does not contain any genetic material from a male but only from women.
Normally, male organisms produce sperm, and female organisms produce eggs. Humans need two matching sets of 23 chromosomes to make up a healthy person. A woman has duplicate versions of 22 chromosomes in common with a man. She has two X chromosomes, however, where a man has one X and one Y chromosome. The presence or absence of a Y chromosome, therefore, dictates whether a person is male or female.
Each egg from a woman contains one half of the genetic material necessary to create a normal person. The other half comes from the sperm. Some sperm have 23 chromosomes including an X chromosome, and some have 22 chromosomes with a Y chromosome. When an X-carrying sperm, sometimes also called a female sperm, fertilizes the egg, the resultant baby is female, and when a Y-carrying chromosome fertilizes the egg, the baby is male.
Only men produce sperm as only men have the Y chromosome to supply the sperm that could make a male baby. Certain genes on the Y chromosome are also thought to play essential roles in sperm production, and women's cells do not have these genes. Scientists, therefore, previously thought that making sperm from women's cells was impossible.
A possible way of making female sperm arose, however, when Professor Karim Nayernia of Newcastle University in the U.K. created sperm-like cells using stem cells as the raw material. In 2006, the team obtained cells from a mouse embryo. In early life, embryonic cells can turn into many different cell types and act as the "stem" from where many forms of cells branch off.
The team treated the embryonic cells with a chemical that made them grow and divide into sperm-like cells. A portion of these cells then became sperm-like, with a head, tail, and half the chromosomes necessary for life, just like regular sperm. They were even capable of fertilizing mouse eggs, which grew into live mouse pups.
Humans past the stage of embryos also have stem cells in various parts of the body. Bone marrow is one area where the cells still have the capability of growing into different types. More experiments at Newcastle University proved that male bone marrow could grow into cells that resembled sperm and that had the necessary 23 chromosomes. Female embryonic stem cells also produced the same type of cells, according to the research team.
Scientific opinion, as of 2011, is still divided about whether these stem cell-derived cells are capable of fulfilling the role of sperm and properly fertilizing an egg to create a child. The procedure is still theoretical. If female sperm were effective at fertilizing eggs, then men would no longer be essential to the creation of a baby, and people like lesbian couples could combine their own, entirely female, genes to make a child.
Sounds like a bit too much in the way of genetic tampering, doesn't it? Expect debates to erupt all over the place should science come up with the "female sperm" mentioned in this article.
On the topic of men supplying the chromosome that determines whether a child is male or female, it's too bad such knowledge wasn't around in King Henry VIII's day. He killed off a bunch of wives because they kept giving birth to girls and it turns out that the sex of the children was completely determined by him. Tragic...
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en.m.wikipedia.org/wiki/Female_sperm
Female sperm. Female sperm can refer to either: A sperm which contains an X chromosome, produced in the usual way by a male, referring to the occurrence of such a sperm fertilizing an egg and giving birth to a female. A hypothetical sperm which artificially contains genetic material from a female.
en.m.wikipedia.org/wiki/Female_sperm
Whenever a woman has unprotected sex with a man, she absorbs the sperm and the sperm becomes a living part of her for life. The research was based on women that were elderly. Many of these women had been carrying the living male DNA inside their brains for over 50 years.
drivenanddesired.com/women-absorb-and …
Do women absorb male DNA from sperm?
Do women absorb male DNA from sperm?
Women Absorb And Retain Male DNA From Sperm. But during their research on the female brain, the study began to uncover other fascinating facts. The study discovered that female brains often contain “male microchimerism”, or to put it simply, MALE DNA that must have come from another person, and are genetically different from the rest of the woman.
drivenanddesired.com/women-absorb-and …
Since the late 1980s, scientists have explored how to produce sperm where all of the chromosomes come from a female donor. In the late 1990s, this concept became a partial reality when scientists in Japan developed chicken female sperm by injecting bone marrow stem cells from a female chicken into a rooster's testicles.
en.m.wikipedia.org/wiki/Female_sperm
https://en.m.wikipedia.org/wiki/Female_sperm
Female sperm can refer to either:
1. A sperm which contains an X chromosome, produced in the usual way by a male, referring to the occurrence of such a sperm fertilizing an egg and giving birth to a female.
2. A sperm which artificially contains genetic material from a female.

This article focuses on the second definition.

Since …
Female sperm can refer to either:
1. A sperm which contains an X chromosome, produced in the usual way by a male, referring to the occurrence of such a sperm fertilizing an egg and giving birth to a female.
2. A sperm which artificially contains genetic material from a female.

This article focuses on the second definition.

Since the late 1980s, scientists have explored how to produce sperm where all of the chromosomes come from a female donor. In the late 1990s, this concept became a partial reality when scientists in Japan developed chicken female sperm by injecting bone marrow stem cells from a female chicken into a rooster's testicles. This technique proved to fall below expectations.
https://www.infobloom.com/what-is-female-sperm.htm
Перевести · 24.01.2021 · Female sperm refers to the idea of create sperm from female cells. Female sperm can refer to those that carry an X chromosome and, after fertilization, result in a female baby, but it can also refer to the theoretical concept of making sperm from female cells instead of male cells.
https://mostitsky_en_ru.academic.ru/11979/female_sperm
Перевести · сущ. женская сперма (содержащая X хромосому) Female sperm is a term that refers to a sperm that contains an X chromosome, produced in the usual way by a male, referring to the fact that, when such a sperm fertilizes an egg, a female …
https://mostitsky_en_ru.academic.ru/11981/female's_sperm
Перевести · сущ. женская сперма (содержащая X хромосому) Female sperm is a term that refers to a sperm that contains an X chromosome, produced in the usual way by a male, referring to the fact that, when such a sperm fertilizes an egg, a female …
https://en.m.wikipedia.org/wiki/Female_Sperm_Storage
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 retained within a specific part of the reproductive tract before the oocyte, or egg, is fertilized. The site of storage is variable among different animal taxa and ranges from structures that appear to function solely for sperm retention, such as insect spermatheca and bird sperm storage tubules (bird anatomy), to more general regions of the reproductive tract enriched wit…
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 retained within a specific part of the reproductive tract before the oocyte, or egg, is fertilized. The site of storage is variable among different animal taxa and ranges from structures that appear to function solely for sperm retention, such as insect spermatheca and bird sperm storage tubules (bird anatomy), to more general regions of the reproductive tract enriched with receptors to which sperm associate before fertilization, such as the caudal portion of the cow oviduct containing sperm-associating annexins. Female sperm storage is an integral stage in the reproductive process for many animals with internal fertilization. It has several documented biological functions including:
• Supporting the sperm by: a.) enabling sperm to undergo biochemical transitions, called capacitation and motility hyperactivation, in which they become physiologically capable of fertilizing an oocyte (e.g. mammals) and b.) maintaining sperm viability until an oocyte is ovulated (e.g. insects and mammals).
• Decreasing the incidence of polyspermy (e.g. some mammals such as pigs).
• Enabling mating, ovulation and/or fertilization to occur at different times or in different environments (e.g. many insects and some amphibians, reptiles, birds and mammals).
• Supporting prolonged and sustained female fertility (e.g. some insects).
• Having a role influencing offspring sex ratios among some insects possessing a haplodiploid sex-determination system (e.g. ants, bees, wasps and thrips as well as some true bugs and some beetles).
• Serving as an arena in which sperm from different mating males compete for access to oocytes, a process called sperm competition, and in which females may preferentially utilize sperm from some males over those of others, called female sperm preference or cryptic female choice (e.g. many invertebrate animals, birds and reptiles).
https://www.dreamstime.com/photos-images/female-sperm.html
Перевести · Your Female Sperm stock images are ready. Download all free or royalty-free photos and vectors. Use them in commercial designs under lifetime, perpetual & worldwide ...
https://www.health.com/sex/semen-facts
Перевести · 12.04.2019 · Sperm can live up to five days inside a woman's reproductive tract, just waiting for that egg to appear so they can fertilize it and do what nature intends them to do. But outside of the …
https://www.sciencedaily.com/releases/2002/11/021108071925.htm
Перевести · 08.11.2002 · "This means," Pitnick says, "that the length of the sperm-storage organ is a mechanism dictating female choice among potential sires of her offspring. Females choose among …
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Female sperm - Wikipedia
Female Sperm