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gamete intrafallopian transfer
An assisted conception procedure in which unfertilised eggs plus sperm (i.e. gametes) are transferred to the fallopian tube, so that fertilisation occurs in the normal place. Because in vitro fertilisation is avoided, for some people GIFT is more morally acceptable than IVF is. The disadvantages are that laparoscopy is required and that for the pregnancy rate to be comparable to IVF too many eggs need to be transferred, risking high multiple pregnancy.
Terms that contain "gamete intrafallopian transfer" in the definition
laparoscopy
A "minimally invasive" surgical operation at which instruments are passed through the wall of the abdomen: (1) for the diagnosis of abnormalities of the abdominal or pelvic organs (such as the fallopian tubes, ovaries and uterus) and to diagnose endometriosis; or (2) therapeutically, to reach the fallopian tubes for certain assisted conception procedures (see gamete intrafallopian transfer and zygote intrafallopian transfer). Carries the risks of surgery (damage to internal organs, hemorrhage, infection) and the risks of general anesthesia.
ovulation induction
The use of drugs to stimulate the development of follicles in the ovaries to undergo ovulation, such as clomiphene, various preparations containing follicle stimulating hormone (FSH), and human chorionic gonadotropin (hCG). The two main situations for it are: in the treatment of infertility due to anovulation typically when there is oligomenorrhea or amenorrhea; and for superovulation in assisted conception (e.g. in vitro fertilisation and gamete intrafallopian transfer)
pronuclear stage transfer
(PROST) A form of assisted conception in which in vitro fertilisation (IVF) is used to produce fertilisation of one or more recovered eggs (oocytes). Useful if the potential fertilising ability of sperm (spermatozoa) is in doubt. Transfer is made on the day after egg retrieval and IVF, before the fertilised egg divides (it's at the pronuclear stage); the transfer is made to the fallopian tube to obtain advantages similar to gamete intrafallopian transfer (GIFT) and is made possible by laparoscopy (with anesthesia) or, less successfully, by transvaginal ultrasound (without anesthesia). Synonymous with zygote intrafallopian transfer (ZIFT).
zygote intrafallopian transfer
(ZIFT) A form of assisted conception in which in vitro fertilisation (IVF) is used to produce fertilisation; transfer is made on the day after egg retrieval and IVF, before the fertilised egg divides (it's at the zygote, or pronuclear stage). Useful if the potential fertilising ability of sperm is in doubt. The transfer is made to the fallopian tube to obtain advantages similar to gamete intrafallopian transfer (GIFT) and is made possible by laparoscopy (with anesthesia) or by transvaginal ultrasound (without anesthesia). Synonymous with pronuclear-stage transfer (PROST).