GIFT+and+ZIFT

GIFT and ZIFT

[]

[]

GIFT (gamete intrafallopian transfer) and ZIFT (zygote intrafallopian transfer) are modified versions of in vitro fertilization. Like IVF, these procedures involve retrieving an egg from the woman and re-implanting it, but in GIFT and ZIFT the process goes more quickly. While in traditional IVF the embryos are observed and raised in a laboratory for 3 to 5 days, in ZIFT, the fertilized eggs -- at this stage called zygotes -- are placed in the fallopian tubes within 24 hours. In GIFT, the sperm and eggs are just mixed together before being inserted and, with luck, one of the eggs will become fertilized inside the fallopian tubes. So what's the advantage to these procedures? The success rates are similar to IVF, and for some women who haven't been able to get pregnant with normal in vitro fertilization, GIFT or ZIFT may be a good idea. The processes used in GIFT and ZIFT are closer to natural conception. In ZIFT, the eggs are placed in the fallopian tubes rather than directly in the uterus. With GIFT, fertilization actually takes place in the body rather than in a petri dish. However, as in vitro fertilization techniques have become more refined, GIFT and ZIFT have become less needed. And since GIFT and ZIFT both require a surgical procedure that IVF does not, IVF is almost always the preferred choice in clinics. In vitro fertilization accounts for at least 98% of all assisted reproductive technology procedures performed in the U.S., while GIFT and ZIFT make up less than 2%. What Types of Infertility Can They Treat? GIFT and ZIFT can be used to treat many types of infertility, except cases caused by damage or abnormalities of the fallopian tubes. These techniques can also be used in cases of mild male infertility, as long as the sperm is capable of fertilizing an egg. Pasted from <[]>