北京皮炎医院哪里好 http://m.39.net/baidianfeng/a_4652392.htmlSTUDYQUESTION:Dooralcontraceptives(OCs)andprogestinsimpactlivebirthrateofIVFwhenusedforcycleschedulinginwomenwithpolycysticovarysyndrome(PCOS)?SUMMARYANSWER:OCsusedforschedulingIVFcyclewereassociatedwithloweredratesofpregnancyandlivebirthafterfreshembryotransfer,whereasprogestinsusedforthispurposeyieldhigherratesofpregnancyandlivebirththanOCs.WHATISKNOWNALREADY:Duetooligo-menorrheainPCOS,OCsandprogestinareextensivelyusedtoschedulethestartofanIVFcycleinwomenwithPCOS.Littleisknownabouttheeffectofsuchpretreatmentsonout