This randomized trial will compare the efficacy of two different times of administration of medications for final oocyte maturation, commonly called a trigger, in cycles of controlled ovarian stimulation (COS) for cycles in which all embryos will be cryopreserved (freeze-all cycles).~The early trigger timing will be based on sonographic observation of at least three follicles reaching at least 17mm in diameter.~The delayed trigger timing will be based on at least three follicles reaching at least 22mm in diameter.
This randomized trial will compare the efficacy of two different times of administration of medications for final oocyte maturation, commonly called a trigger, in cycles of controlled ovarian stimulation (COS) for cycles in which all embryos will be cryopreserved (freeze-all cycles).