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ooralcontraceptives(OCs)andprogestinsimpactlivebirthrateofIVFwhenusedforcycleschedulinginwomenwithpolycysticovarysyndrome(PCOS)?SUMMARYANSWER:OCsusedforschedulingIVFcyclewereassociatedwithloweredratesofpregnancyandlivebirthafterfreshembryotransfer,whereasprogestinsusedforthispurposeyieldhigherratesofpregnancyandlivebirththanOCs.WHATISKNOWNALREADY

uetooligo-menorrheainPCOS,OCsandprogestinareextensivelyusedtoschedulethestartofanIVFcycleinwomenwithPCOS.Littleisknownabouttheeffectofsuchpretreatmentsonout