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September 21, 1998

Despite many advances in assisted-reproduction technologies, success rates still range from about 22% to 35% per retrieval (the process of transferring eggs, sperm or embryos to the uterus). Nevertheless, the most recent U.S. statistics--from 1995--show the highest success rates ever.

Number of cycles or procedures

Standard IVF: 36,035

IVF and ICSI: 5,052

GIFT: 3,741

ZIFT: 1,078

Host uterus: 200

Deliveries per retrieval

Standard IVF: 22.3%

IVF and ICSI: 23.5%

GIFT: 27%

ZIFT: 27.9%

Host uterus: 34.9

Source: American Society for Reproductive Medicine

Glossary

In-vitro fertilization (IVF) with intracytoplasmic sperm injection (ICSI) is traditional in-vitro fertilization that is carried out by injecting a single sperm into an egg, then transferring the egg to the uterus.

Gamete intrafallopian transfer (GIFT) is when mature eggs and sperm are transferred to the Fallopian tube where fertilization can occur.

Zygote intrafallopian transfer (ZIFT) is when the fertilized egg is transferred to the Fallopian tube.

Host uterus is a surrogate mother.

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