DOES CRYOPRESERVATION AFFECT THE IMPLANTATION POTENTIAL OF BLASTOCYSTS DERIVED FROM VITRIFIED/WARMED OOCYTES?

Vitrified, or “frozen”, donor eggs (VDE) can either be fertilized and cultured for fresh transfer (group 1), or fertilized and cryopreserved for transfer in a “frozen embryo transfer” cycle (FET, group 2). This study compared implantation rates between the two groups. A retrospective cohort study analyzing 800 frozen donor egg cycles from a commercial egg bank. Cycles were limited to single embryo transfers (ET) without preimplantation genetic...