Purpose: This study evaluated the influence of post-warming culture time on the live birth rate in day-3 and day-5 frozen embryo transfer (FET) cycles.
Methods: This multicenter, retrospective cohort study was performed at IVFMD, My Duc Hospital and IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital in Vietnam between October 2019 and October 2020. Women who underwent FET cycles with the transfer of ≤2 day-3 or day-5 embryos were included in the study.