Blastocyst culture and transfer increases the efficiency of oocyte donation

Abstract

Objective: To determine the impact of blastocyst transfer on an oocyte donation program. Design: Retrospective review of embryo transfer in an IVF clinic. Setting: Private assisted reproductive technology unit. Patient(s): Two hundred and twenty nine patients undergoing oocyte donation. Intervention(s): Culture of pronucleate embryos to either day 3 or day 5 followed by embryo transfer. Main Outcome Measure(s): Implantation rates, pregnancy rates, and multiple gestations were analyzed. Result(s): Implantation rates and pregnancy rates were significantly increased by moving to extended embryo culture and transfer on day 5. After day 3 transfers, implantation and pregnancy rates were 47.1% and..