Female sperm — is a term that traditionally refers to a sperm that contains an X chromosome (since when such a sperm fertilizes an egg, a female daughter is born) produced, in the usual way by a male. However, for over 20 years, dating back to the late 1980s,… … Wikipedia
Sperm competition — is competition between sperm of two or more males for the fertilization of an ovum (Parker 1970). Sperm competition is often compared to having tickets in a raffle; a male has a better chance of winning (i.e. fathering offspring) the more tickets … Wikipedia
Sperm donation — is the provision (or ‘donation’) by a man, (known as a ‘sperm donor’), of his sperm, with the intention that it be used to impregnate a woman who is not usually the man s sexual partner, in order to produce a child. A sperm donor is the natural… … Wikipedia
Sperm heteromorphism — is the simultaneous production of two or more distinguishable types of sperm by a single male. The sperm types might differ in size, shape and/or chromosome complement. Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism… … Wikipedia
Sperm whale — Sperm Whale[1] Size compared to an average human … Wikipedia
Female infertility — Classification and external resources ICD 10 N97.0 ICD 9 628 … Wikipedia
Female — (♀) is the sex of an organism, or a part of an organism, which produces ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by… … Wikipedia
Sperm sorting — is a means of sex selection in which spermatozoa are separated into X (female) and Y (male) chromosome bearing populations based on their difference in DNA content. The resultant sex sorted spermatozoa are then able to be used in conjunction with … Wikipedia
Sperm washing — is a term used to describe the process in which individual sperm are separated from the seminal fluid by spinning it in a centrifuge. The Sperm are then used in intrauterine insemination or in vitro fertilization. Sperm washing is a standard… … Wikipedia
sperm — [spə:m US spə:rm] n plural sperm or sperms [Date: 1300 1400; : Late Latin; Origin: sperma, from Greek, seed ] 1.) also sperm cell a cell produced by the sex organs of a male person or animal, which is able to join with the female egg to … Dictionary of contemporary English
Female condom — Polyurethane female condom Background Birth control type Barrier First use 1980s … Wikipedia
