A mandatory single blastocyst transfer policy with educational campaign in a United States IVF program reduces multiple gestation rates without sacrificing pregnancy rates
Received 14 December 2006; received in revised form 2 March 2007; accepted 2 March 2007. published online 08 May 2007.
Objective
To reduce the twin rate in our IVF program.
Design
A prospective educational study of infertile couples; a retrospective review of IVF outcomes before vs. after mandatory single embryo transfer (mSBT) policy change.
Setting
University-based infertility center.
Patient(s)
One hundred ten of 120 consecutive new infertile couples completed the educational study. Outcomes of all embryo transfers (n = 693) performed 17 months before and 17 months after mSBT were evaluated.
Intervention(s)
A 1-page educational summary of comparative risks of twins vs. singletons to maternal and child health.
Main Outcome Measure(s)
Knowledge of twin risks and desired number of embryos transfered before and after education. Pregnancy rates, number of embryos transfered, and multiple-gestation rates before and after mSBT policy.
Result(s)
After education, knowledge of twin risks improved and a significant number of subjects changed their desired outcome to a lower gestational number. There was no change in ongoing pregnancy rates with blastocyst transfer before and after mSBT (63% vs. 58%; NS). Program-wide number of embryos transfered (2.1 ± 0.6 vs. 1.9 ± 0.7) and multiple-gestation rates (35% vs. 19%) decreased significantly while pregnancy rates were maintained.
Conclusion(s)
Simple educational materials can improve knowledge of twin pregnancy risks and affect decision making. In high-risk patients, mSBT results in pregnancy rates similar to two-blastocyst transfer, with decreased twin rates.
Department of Obstetrics and Gynecology, University of Iowa Carver College of Medicine, Iowa City, Iowa
Reprint Requests: Bradley J. Van Voorhis, M.D., Department of Obstetrics and Gynecology, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, Iowa 52242-1080 (FAX: 319-353-6659).
Supported by an Obermann Center for Advanced Studies Spelman Rockefeller grant.
ABSTRACT