Outcome of blastocyst transfer according to availability of excess blastocysts suitable for cryopreservation

cycles with excess but unfreezeable blastocysts. In group 3, there were no excess blastocysts.Ovarian stimulation was undertaken using a long gonadotrophin-releasing hormone (GnRH) analogue protocol combined with pure or recombinant FSH. ICSI was performed according to standard protocols. Sequential media system (G1 and G2 media; Vitro Life) for further embryonic development was used for embryo culture. Embryos were cultured individually in microdroplets