Embryology Research Today is a free monthly online journal that collates and summarizes the latest research about Embryology, including details on stem cells, reproduction, transplants, cloning.

Successful pregnancy rates achieved with day 4 embryo transfers.

Skorupski JC, Stein DE, Acholonu U, Field H, Keltz M

Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, St. Luke's-Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York 10019, USA. josh_skorupski@hotmail.com

OBJECTIVE: To assess the success of day 4 embryo transfers (ETs) following IVF at one institution. DESIGN: Retrospective analysis. SETTING: A university hospital IVF program. PATIENT(S): Two hundred nondonor, fresh IVF cycles. INTERVENTION(S): None. MAIN OUTCOME MEASURE: Outcomes of IVF. Outcome assessments after day 4 ETs included rates of implantation, clinical pregnancy, and singleton and multiple live births. RESULT(S): The overall live-birth rate was 54.4%. Implantation rates were highest in younger age groups, and similar in patients 35-40 years of age. Pregnancy and live-birth rates were similar across all age groups up to age 40 years. Multiple gestations were highest in women < or =40 years of age. CONCLUSION: Acceptable pregnancy rates can be achieved with day 4 ETs.

Published 13 April 2007 in Fertil Steril, 87(4): 788-91.
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