AnatomyOrganismsDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsAnthropology, Education, Sociology and Social PhenomenaHumanitiesInformation ScienceNamed GroupsHealth CareGeographicals
Unsafe SexSexual BehaviorCoitusContraceptives, PostcoitalInfertilityInfertility, MaleInfertility, FemaleRisk-TakingSexually Transmitted DiseasesCondomsHIV InfectionsSexual PartnersHomosexuality, MaleAdolescent BehaviorPregnancyMasturbationSafe SexSexual AbstinenceContraception BehaviorSex EducationFertilityReproductive Techniques, AssistedHeterosexualityHealth Knowledge, Attitudes, PracticeQuestionnairesContraceptionRisk FactorsContraceptive Devices, MalePregnancy in AdolescenceSemenSpermatozoaFallopian Tube DiseasesCross-Sectional StudiesGenitalia, FemaleContraception, PostcoitalRapeStudentsDyspareuniaAzoospermiaOrgasmSexually Transmitted Diseases, ViralVaginaFertilization in VitroSexualityPrevalenceHIV SeropositivitySpermatogenesisProstitutionSubstance-Related DisordersLogistic ModelsSperm CountOligospermiaExtramarital RelationsSperm MotilityAge FactorsBisexualityPregnancy, UnplannedEndometriosisPregnancy RateCoercionHysterosalpingographyPregnancy, UnwantedVaricoceleReligion and SexHomosexualityUnited StatesSexual Dysfunction, PhysiologicalErectile DysfunctionReproductive MedicineSemen AnalysisReproductive Health ServicesReproductive TechniquesClomipheneSex FactorsTestisSingle PersonTime FactorsSexual Dysfunctions, PsychologicalProspective StudiesSocioeconomic FactorsInterviews as TopicPenisAnovulationMenstrual Hygiene ProductsAlcohol DrinkingRisk Reduction BehaviorInterpersonal RelationsUniversitiesOvulation InductionSperm Injections, IntracytoplasmicAcquired Immunodeficiency SyndromeEjaculationAsthenozoospermiaChlamydia InfectionsIntentionCondoms, FemaleStudent Health ServicesCohort StudiesLongitudinal StudiesAttitude