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Contraceptives, OralContraceptives, Oral, CombinedContraceptive AgentsPropionibacterium acnesContraceptives, Oral, HormonalContraceptive Agents, FemaleContraceptives, Oral, SyntheticContraceptive DevicesContraceptionContraceptive Devices, FemaleContraception BehaviorContraceptive Agents, MaleIntrauterine DevicesFamily Planning ServicesEthinyl EstradiolDesogestrelNorgestrelLevonorgestrelContraceptives, PostcoitalMestranolNorethindroneVaccines, ContraceptivePregnancy, UnplannedSterilization, ReproductivePregnancy, UnwantedMedroxyprogesterone AcetateSpermatocidal AgentsContraception, PostcoitalAcne KeloidIntrauterine Devices, CopperMenstruationNorethynodrelDermatologic AgentsEthynodiol DiacetatePregnancyAbortion, InducedSebumContraception, ImmunologicNorpregnenesEthinyl Estradiol-Norgestrel CombinationBenzoyl PeroxideProgestinsContraceptives, Oral, SequentialContraceptives, Postcoital, HormonalIsotretinoinSterilization, TubalAndrostenesPropionibacteriumMenstrual CycleMenstruation DisturbancesSebaceous GlandsProgesterone CongenersHealth Knowledge, Attitudes, PracticeParityIntrauterine Devices, MedicatedContraceptive Devices, MalePregnancy in AdolescenceMegestrolContraceptives, Postcoital, SyntheticDrug ImplantsSex EducationGram-Positive Bacterial InfectionsSpermatogenesis-Blocking AgentsOvulation InhibitionEstradiol CongenersMedroxyprogesteroneFertilityCondomsSexual BehaviorNorpregnadienesTransdermal PatchEthisteroneUterine HemorrhageRisk FactorsMetrorrhagiaEstrogensNonoxynolQuestionnairesCoitusAbortion ApplicantsCase-Control StudiesCyproterone AcetateAge FactorsXanthurenatesAbortion, LegalReproductive Health ServicesMarriageWomen's HealthReproductive HistorySexually Transmitted DiseasesCoitus InterruptusLogistic ModelsAmenorrheaHirsutismBirth RateTime FactorsAcquired Hyperostosis SyndromeCross-Sectional StudiesMenPostpartum Period