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 whale — Sperm Whale[1] Size compared to an average human … 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 — The term sperm is derived from the Greek word (σπέρμα) sperma (meaning seed ) and refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes… … Wikipedia
Sperm Whale — Taxobox name = Sperm WhaleMSW3 Cetacea | id=14300131 ] status = VU status system = iucn3.1 status ref = [IUCN2008|assessors=Taylor, B.L., Baird, R., Barlow, J., Dawson, S.M., Ford, J., Mead, J.G., Notarbartolo di Sciara, G., Wade, P. Pitman,… … 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
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 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
