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ProgestinsContraceptives, OralContraceptives, Oral, CombinedContraceptive AgentsContraceptives, Oral, HormonalContraceptive Agents, FemaleContraceptives, Oral, SyntheticContraceptive DevicesContraceptionContraceptive Devices, FemaleNorgestrelContraception BehaviorProgesterone CongenersNorethindroneContraceptive Agents, MaleLevonorgestrelDesogestrelMedroxyprogesterone AcetateEthinyl EstradiolIntrauterine DevicesFamily Planning ServicesPromegestoneMestranolContraceptives, PostcoitalMedroxyprogesteroneNorpregnadienesNorpregnenesEstrogen Replacement TherapyVaccines, ContraceptiveNorethynodrelNorprogesteronesReceptors, ProgesteronePregnancy, UnplannedEstrogensSterilization, ReproductiveProgesteronePregnancy, UnwantedIntrauterine Devices, MedicatedMenstruationPregnancyMegestrolAndrostenesEstrogens, Conjugated (USP)Ethynodiol DiacetateContraceptives, Oral, SequentialSpermatocidal AgentsContraception, PostcoitalPregnenedionesDrug ImplantsIntrauterine Devices, CopperAbortion, InducedMifepristoneContraception, ImmunologicHormone Replacement TherapyEstradiolEthinyl Estradiol-Norgestrel CombinationMenstrual CycleUterine HemorrhageHydroxyprogesteronesChlormadinone AcetateContraceptives, Postcoital, HormonalSpermatogenesis-Blocking AgentsEndometriumMenstruation DisturbancesEstradiol CongenersSterilization, TubalEndometrial Hyperplasia20-alpha-DihydroprogesteroneParityMetrorrhagia5-alpha-DihydroprogesteroneCyproterone AcetateMenopauseFertilityPostmenopauseHealth Knowledge, Attitudes, PracticeRisk FactorsContraceptive Devices, MaleNandrolonePregnancy in AdolescenceContraceptives, Postcoital, SyntheticBreast NeoplasmsLynestrenolSex EducationEndometrial NeoplasmsOvulation InhibitionClimactericDydrogesteroneTime FactorsCondomsSexual BehaviorTransdermal PatchMelengestrol AcetateWomen's HealthEthisteronePostpartum PeriodOvulationHormone AntagonistsPregnanediolCase-Control Studies