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What is involved in gamete intrafallopian transfer (GIFT) and zygote intrafallopian transfer (ZIFT)?

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Like IVF, these procedures involve retrieving an egg from the woman, combining with sperm in a lab then transferring back to her body, 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.

SOURCES:
American Society for Reproductive Medicine web site.
American College of Obstetricians and Gynecologists web site.
WebMD Fertility Center web site. 

Human Reproduction Update, July-August 2002. 
The Infertility Workup and Understanding Treatment Options, RESOLVE online. 
The Merck Manual, Seventeenth Edition, 2000. 
The Fertility Handbook: A Guide to Getting Pregnant, Addicus Books, 2002. 
Assisted Reproductive Technology National Summary Report , 2015, CDC.

WebMD Medical Reference.

Reviewed by Nivin Todd on June 19, 2020

SOURCES:
American Society for Reproductive Medicine web site.
American College of Obstetricians and Gynecologists web site.
WebMD Fertility Center web site. 

Human Reproduction Update, July-August 2002. 
The Infertility Workup and Understanding Treatment Options, RESOLVE online. 
The Merck Manual, Seventeenth Edition, 2000. 
The Fertility Handbook: A Guide to Getting Pregnant, Addicus Books, 2002. 
Assisted Reproductive Technology National Summary Report , 2015, CDC.

WebMD Medical Reference.

Reviewed by Nivin Todd on June 19, 2020

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What are the advantages of gamete intrafallopian transfer (GIFT) and zygote intrafallopian transfer (ZIFT)?

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