Efficiency of changing the embryo transfer time from day 3 to day 2 among women with poor ovarian response: A prospective randomized trial

To compare the outcome of day 2 and day 3 embryo transfers in women demonstrating poor ovarian response. Prospective randomized clinical trial. Private assisted reproductive technology center. Two hundred eighty-one women demonstrating poor ovarian response to controlled ovarian hyperstimulation. Women who were poor responders were randomly allocated to day 2 or day 3 embryo transfer following oocyte retrieval. Implantation rates and pregnancy rates per oocyte retrieval and embryo transfer. The clinical pregnancy rates per oocyte retrieval (37.2% vs. 21.4%, respectively; P