C Wilson1, J H Check, D Summers-Chase, J K Choe, J Amui, D Brasile. 1. The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, Cooper Hospital/University Medical Center, Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology & Infertility, Camden, NJ, USA.
Abstract
PURPOSE: To determine if the longer length of time that embryos donated to an anonymous couple have been frozen has a negative effect of subsequent successful pregnancy following thawing and transfer to the recipients. METHODS: Retrospective determination of pregnancy rates according to the length of cryopreservation time has on pregnancy outcome following transfer of embryos designated for donation. RESULTS: Longer time of freezing did not adversely affect subsequent pregnancy rates following frozen embryo transfer. CONCLUSIONS: Donated embryos frozen for over five years (the time when some countries demand that the embryos be discarded) contributed to one-fourth of the donor embryo pool and one-third of the live deliveries.
PURPOSE: To determine if the longer length of time that embryos donated to an anonymous couple have been frozen has a negative effect of subsequent successful pregnancy following thawing and transfer to the recipients. METHODS: Retrospective determination of pregnancy rates according to the length of cryopreservation time has on pregnancy outcome following transfer of embryos designated for donation. RESULTS: Longer time of freezing did not adversely affect subsequent pregnancy rates following frozen embryo transfer. CONCLUSIONS: Donated embryos frozen for over five years (the time when some countries demand that the embryos be discarded) contributed to one-fourth of the donor embryo pool and one-third of the live deliveries.