Effect of post thaw to embryo transfer culture period on embryo metabolism and pregnancy outcome

The increasing reliance on blastocyst vitrification in Assisted Reproductive Technologies (ART) during the past decades has led to a significant surge in frozen embryo transfer (FET) cycles. Therefore, greater focus has aimed to optimize the protocols for FET as well as the timing between thaw and embryo transfer. In this study, our objectives were to examine the impact of duration of post thaw culture until embryo transfer on (i) pregnancy outcome and (ii) on metabolic stability of blastocysts post thaw.