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Contraceptives, OralContraceptives, Oral, CombinedContraceptive AgentsContraceptives, Oral, HormonalContraceptive Agents, FemaleContraceptives, Oral, SyntheticContraceptive DevicesContraceptionContraceptive Devices, FemaleContraception BehaviorInjectionsContraceptive Agents, MaleIntrauterine DevicesFamily Planning ServicesEthinyl EstradiolDesogestrelNorgestrelLevonorgestrelContraceptives, PostcoitalMestranolNorethindroneVaccines, ContraceptivePregnancy, UnplannedSterilization, ReproductivePregnancy, UnwantedInjections, IntramuscularMedroxyprogesterone AcetatePregnancySpermatocidal AgentsContraception, PostcoitalMenstruationIntrauterine Devices, CopperNorethynodrelInjections, IntravenousAbortion, InducedEthynodiol DiacetateContraception, ImmunologicProgestinsNorpregnenesEthinyl Estradiol-Norgestrel CombinationContraceptives, Oral, SequentialContraceptives, Postcoital, HormonalInjections, IntralesionalInjections, SubcutaneousInjections, Intra-ArticularSterilization, TubalProgesterone CongenersAndrostenesMenstrual CycleHealth Knowledge, Attitudes, PracticeParityIntrauterine Devices, MedicatedTime FactorsDrug ImplantsInjections, IntraperitonealContraceptive Devices, MalePregnancy in AdolescenceMenstruation DisturbancesMegestrolContraceptives, Postcoital, SyntheticSex EducationFertilitySexual BehaviorSpermatogenesis-Blocking AgentsMedroxyprogesteroneOvulation InhibitionCondomsTransdermal PatchNorpregnadienesInjections, IntradermalEthisteroneInjections, EpiduralInjections, IntraventricularEstradiol CongenersUterine HemorrhageRisk FactorsMetrorrhagiaEstrogensInjections, Intra-ArterialIntravitreal InjectionsInjections, SpinalAge FactorsNonoxynolCoitusAbortion ApplicantsQuestionnairesInjections, JetXanthurenatesCase-Control StudiesAbortion, LegalInjections, IntraocularReproductive Health ServicesLogistic ModelsMarriageSexually Transmitted DiseasesWomen's HealthReproductive HistoryDelayed-Action PreparationsCoitus InterruptusAmenorrhea