AnatomyDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsAnthropology, Education, Sociology and Social PhenomenaTechnology, Industry, AgricultureHumanitiesInformation ScienceNamed GroupsHealth CareGeographicals
ContraceptionContraceptive AgentsContraceptives, OralContraceptive Agents, FemaleContraception BehaviorContraceptive DevicesContraceptive Devices, FemaleContraceptives, Oral, CombinedContraceptives, Oral, HormonalIntrauterine DevicesFamily Planning ServicesSterilization, ReproductivePregnancy, UnplannedContraceptives, Oral, SyntheticContraceptive Agents, MalePregnancy, UnwantedSterilization, TubalLevonorgestrelTransdermal PatchDesogestrelAbortion, InducedIntrauterine Devices, CopperCoitus InterruptusSpermatocidal AgentsNatural Family Planning MethodsPregnancyCondomsMedroxyprogesterone AcetateHealth Knowledge, Attitudes, PracticeEthinyl EstradiolNorgestrelIntrauterine Devices, MedicatedContraceptives, PostcoitalContraceptive Devices, MaleMarriageMestranolContraception, BarrierNorethindronePregnancy in AdolescenceAbortion ApplicantsReproductive MedicineDrug ImplantsFamily Planning PolicySex EducationVaccines, ContraceptiveChoice BehaviorAbortion, LegalSexual BehaviorCoitusFertilityPostpartum PeriodMissouriWomen's HealthSterilization ReversalSexual PartnersSexually Transmitted DiseasesQuestionnairesParityLogistic ModelsSocioeconomic FactorsCross-Sectional StudiesUnited StatesContraception, PostcoitalMenstruationNorethynodrelEthynodiol DiacetateMarital StatusAdolescent BehaviorAge FactorsContraception, ImmunologicRural PopulationNorpregnenesEthinyl Estradiol-Norgestrel CombinationCounselingProgestinsContraceptives, Oral, SequentialContraceptives, Postcoital, HormonalRisk FactorsEducational StatusCohort StudiesHealth Services AccessibilityFamily CharacteristicsInterviews as TopicHealth SurveysPatient Acceptance of Health CareDecision MakingInterpersonal RelationsAndrostenesHealth Care SurveysMenstrual CycleHealth EducationData CollectionMultivariate AnalysisProgesterone CongenersPatient ComplianceTime FactorsProspective StudiesAfrican AmericansMenstruation DisturbancesMegestrol