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
Contraceptives, OralContraceptives, Oral, CombinedContraceptive AgentsContraceptives, Oral, HormonalContraceptive Agents, FemaleContraceptives, Oral, SyntheticContraceptive DevicesContraceptionContraceptive Devices, FemaleContraception BehaviorContraceptive Agents, MaleIntrauterine DevicesFamily Planning ServicesEthinyl EstradiolDesogestrelNorgestrelLevonorgestrelContraceptives, PostcoitalMestranolNorethindroneVaccines, ContraceptivePregnancy, UnplannedSterilization, ReproductivePregnancy, UnwantedMedroxyprogesterone AcetateSpermatocidal AgentsContraception, PostcoitalNorethynodrelMenstruationIntrauterine Devices, CopperPregnancyEthynodiol DiacetateContraception, ImmunologicAbortion, InducedNorpregnenesProgestinsEthinyl Estradiol-Norgestrel CombinationSynthetic BiologyContraceptives, Oral, SequentialContraceptives, Postcoital, HormonalSterilization, TubalGenes, SyntheticProgesterone CongenersAndrostenesMenstrual CycleParityIntrauterine Devices, MedicatedHealth Knowledge, Attitudes, PracticeContraceptive Devices, MaleMegestrolPregnancy in AdolescenceContraceptives, Postcoital, SyntheticMenstruation DisturbancesDrug ImplantsSex EducationMedroxyprogesteroneEstradiol CongenersSpermatogenesis-Blocking AgentsOvulation InhibitionNorpregnadienesFertilityCondomsSexual BehaviorTransdermal PatchEthisteroneMolecular Sequence DataUterine HemorrhageMetrorrhagiaEstrogensAmino Acid SequenceRisk FactorsTime FactorsNonoxynolCoitusAbortion ApplicantsXanthurenatesPeptidesAge FactorsAbortion, LegalReproductive Health ServicesCase-Control StudiesMarriageQuestionnairesWomen's HealthReproductive HistoryLogistic ModelsSexually Transmitted DiseasesCoitus InterruptusAmenorrheaChlormadinone AcetateBirth RateMenPostpartum PeriodCounselingSocioeconomic FactorsUnited StatesDelayed-Action PreparationsFamily Planning PolicyCross-Sectional StudiesNorprogesterones