in vitro fertilization

(IVF)
fertilization of an ovum outside the body, the resultant zygote being incubated to the blastocyst stage and then implanted in the uterus. The technique, pioneered in Britain, resulted in 1978 in the birth of the first test-tube baby. IVF is employed when a woman has blocked Fallopian tubes or some other impediment to the union of sperm and ovum in the reproductive tract. The mother-to-be is given hormone therapy causing a number of ova to mature at the same time (see superovulation). Several of them are then removed from the ovary through a laparoscope. The ova are mixed with spermatozoa from her partner and incubated in a culture medium until the blastocyst is formed. The blastocyst is then implanted in the mother's uterus and the pregnancy allowed to continue normally.

Medical dictionary. 2011.

Look at other dictionaries:

  • in vitro fertilization — noun : fertilization of an egg in a laboratory dish or test tube ; specifically : fertilization achieved by the mixture usually in a laboratory dish of sperm with eggs that have been surgically removed from an ovary followed by implantation of… …   Useful english dictionary

  • In vitro fertilization — IVF, a laboratory procedure in which sperm are placed with an unfertilized egg in a Petri dish to achieve fertilization. The embryo is then transferred into the uterus to begin a pregnancy or cryopreserved (frozen) for future use. IVF was… …   Medical dictionary

  • in vitro fertilization — a specialized technique by which an ovum, esp. a human one, is fertilized by sperm outside the body, with the resulting embryo later implanted in the uterus for gestation. [1970 75] * * * ▪ medicine Introduction also called  test tube conception  …   Universalium

  • in vitro fertilization — apvaisinimas in vitro statusas T sritis augalininkystė apibrėžtis Dirbtinis izoliuotų augalo žiedų ar kitų organų (mezginės, sėklapradžio) apvaisinimas ne motininiame organizme, o mėgintuvėlyje ar Petri lėkštelėje, t. y. dirbtinėmis sąlygomis.… …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • in vitro fertilization — noun Date: 1969 fertilization of an egg in a laboratory dish or test tube; specifically fertilization by mixing sperm with eggs surgically removed from an ovary followed by uterine implantation of one or more of the resulting fertilized eggs… …   New Collegiate Dictionary

  • in vitro fertilization — noun The fertilization of an egg by sperm outside of a womans body; normally used as a treatment for infertility …   Wiktionary

  • in vitro fertilization — n. IVF, fertilization of an egg outside of the body (i.e. test tube, petri dish) …   English contemporary dictionary

  • in vitro fertilization — IVF fertilization of an ovum outside the body, the resultant zygote being incubated to the blastocyst stage and then implanted in the uterus. The technique, pioneered in Britain, resulted in 1978 in the birth of the first test tube baby. IVF may… …   The new mediacal dictionary

  • in vitro fertilization — in vi|tro fer|ti|li|za|tion [ın ˌvi:trəu fə:tılaıˈzeıʃən US trou fə:rtələ ] n [U] technical [Date: 1900 2000; : Latin; Origin: in vitro in glass ] a process in which a human egg is fertilized outside a woman s body …   Dictionary of contemporary English

  • in vitro fertilization — in vitro fertili,zation noun uncount IVF …   Usage of the words and phrases in modern English

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