Search results
Results from the WOW.Com Content Network
Sperm storage organs in the fruit fly Drosophila melanogaster.Female was first mated with GFP-male and then re-mated with RFP-male. 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.
Sperm donation. A donor provides sperm in order to father a child for a third-party female. Egg donation. A donor provides ova to a woman or couple in order for the egg to be fertilized and implanted in the recipient woman. Spindle transfer. A third party's mitochondrial DNA is transferred to the future mother's ovum.
Sperm sample: a sperm donor is selected and could be an anonymous or known donor. High-quality sperm increases the likelihood of success and is an important factor to consider. [4] Ovarian stimulation: the partner donating the eggs will undergo an ovarian stimulation cycle and a sequential egg retrieval. [5] Naturally, a woman produces only one ...
Cryptic female choice is a form of mate choice which occurs both in pre- and post-copulatory circumstances in which females of certain species use physical or chemical mechanisms to control a male's success of fertilizing their ova or ovum; i.e. by selecting whether sperm are successful in fertilizing their eggs or not.
A woman who becomes pregnant by a sperm donor will be the recipient of his genetic material but the two may never even meet. Artificial insemination, which is the normal method of introducing donor sperm into a woman's body, thus becomes a substitute for sexual intercourse. If the woman becomes pregnant, the resulting pregnancy will be no ...
The sperm for insemination may be provided either by a sexual partner of the female's choice or by a sperm donor. [14] Donor sperm is most commonly used by lesbian couples and single women, [15] and by heterosexual couples when the male partner is suffering from male infertility. [16]
Oppenheim fell into the world of prolific sperm donors through former New York Times reporter Nellie Bowles — who is married to ex-New York Times columnist Bari Weiss — and was interested in ...
A 1992 World Health Organization report described normal human semen as having a volume of 2 mL or greater, pH of 7.2 to 8.0, sperm concentration of 20×10 6 spermatozoa/mL or more, sperm count of 40×10 6 spermatozoa per ejaculate or more, and motility of 50% or more with forward progression (categories a and b) of 25% or more with rapid ...