Contraceptives, OralContraceptives, Oral, CombinedContraceptives, Oral, HormonalContraceptives, Oral, SyntheticContraceptive AgentsEthinyl EstradiolContraceptive Agents, FemaleMestranolNorgestrelDesogestrelNorethindroneContraceptionLevonorgestrelContraceptive DevicesContraceptive Devices, FemaleContraception BehaviorIntrauterine DevicesEthynodiol DiacetateLynestrenolNorpregnenesContraceptive Agents, MaleNorethynodrelFamily Planning ServicesMenstruationContraceptives, PostcoitalProgestinsEthinyl Estradiol-Norgestrel CombinationAndrostenesMenstrual CycleParityPregnancy, UnplannedMegestrolContraceptives, Oral, SequentialMedroxyprogesterone AcetatePregnancySterilization, ReproductiveProgesterone CongenersVaccines, ContraceptiveMenstruation DisturbancesEstradiol CongenersXanthurenatesPregnancy, UnwantedRisk FactorsEstrogensCase-Control StudiesSterilization, TubalReproductive HistoryOvulation InhibitionAbortion, InducedMetrorrhagiaThromboembolismNorpregnadienesSpermatocidal AgentsContraception, PostcoitalAge FactorsMenarcheMenopauseVenous ThrombosisIntrauterine Devices, MedicatedIntrauterine Devices, CopperUterine HemorrhagePyridoxineAmenorrheaDysmenorrheaTransdermal PatchThrombophlebitisContraception, ImmunologicChlormadinone AcetateTime FactorsAcne VulgarisDrug InteractionsCyproterone AcetateMedroxyprogesteroneRiskContraceptive Devices, MaleHealth Knowledge, Attitudes, PracticeContraceptives, Postcoital, HormonalEstrogen Replacement TherapyPremenopauseHormone Replacement TherapyMegaloblastsSmokingPregnancy in AdolescenceSexual BehaviorOdds RatioQuestionnairesLogistic ModelsBreast NeoplasmsFertilityOvarian NeoplasmsFactor VCohort StudiesGonadal Steroid HormonesCondomsUterine Cervical NeoplasmsWomen's HealthThyroxine-Binding GlobulinIntracranial Embolism and ThrombosisCoitus InterruptusPregnanediol