Overview Replacement of Fresh Embryo Transfers (ETs) by Frozen Embryo Transfers (FETs) Using Vitrification Status: Unknown status Trial end date: 2009-12-01 Target enrollment: Participant gender: Summary Cryopreservation of all embryos and transferring them subsequently in assisted reproductive technology (ART) cycles to improve outcome. Phase: Phase 1/Phase 2 Details Lead Sponsor: Yazd Research & Clinical Center for InfertilityTreatments: BuserelinChorionic Gonadotropin