RecruitingClinical trialHormonal Optimization: Late vs. Immediate Start After Discontinuation of Oral Contraceptives in Assisted Reproductive technologY (HOLIDAY)HOLIDAY is a two-arm, parallel-group, multi-center, randomized trial in which subjects undergoing planned oocyte cryopreservation will be randomized to receive either a 2-month pause of Combined Hormonal Contraceptives (CHC) or immediate start (without a pause).