Contraceptives, OralProgestinsContraceptives, Oral, CombinedContraceptives, Oral, HormonalContraceptives, Oral, SyntheticEstrogensContraceptive AgentsEthinyl EstradiolContraceptive Agents, FemaleNorgestrelMestranolNorethindroneDesogestrelLevonorgestrelContraceptionContraceptive DevicesReceptors, EstrogenContraceptive Devices, FemaleContraception BehaviorProgesterone CongenersMedroxyprogesterone AcetateNorpregnenesEstrogen Receptor alphaNorethynodrelLynestrenolIntrauterine DevicesContraceptive Agents, MaleEthynodiol DiacetateMenstruationEstrogens, Conjugated (USP)Estrogen Receptor betaEstradiolFamily Planning ServicesAndrostenesContraceptives, PostcoitalMegestrolEstradiol CongenersPromegestoneEthinyl Estradiol-Norgestrel CombinationNorpregnadienesMedroxyprogesteroneMenstrual CycleReceptors, ProgesteroneEstrogen Replacement TherapyPregnancyContraceptives, Oral, SequentialParityProgesteronePregnancy, UnplannedBreast NeoplasmsMenstruation DisturbancesSterilization, ReproductiveRisk FactorsMenopauseVaccines, ContraceptiveHormone Replacement TherapyIntrauterine Devices, MedicatedNorprogesteronesXanthurenatesCase-Control StudiesMetrorrhagiaOvariectomyPregnancy, UnwantedChlormadinone AcetateUterine HemorrhageReproductive HistorySterilization, TubalCyproterone AcetatePostmenopauseOvulation InhibitionTime FactorsAbortion, InducedThromboembolismAge FactorsDrug ImplantsSelective Estrogen Receptor ModulatorsEndometriumEstrogens, CatecholGonadal Steroid HormonesAmenorrheaMenarcheVenous ThrombosisPregnenedionesEndometrial NeoplasmsPremenopauseSpermatocidal AgentsContraception, PostcoitalRiskDrug InteractionsNandroloneMifepristoneIntrauterine Devices, CopperClimactericDiethylstilbestrolDysmenorrheaPyridoxineUterusPregnanediolTransdermal PatchThrombophlebitis