Infertility, MaleOligospermiaAzoospermiaSperm WhaleSpermatozoaSperm CountInfertilityInfertility, FemaleSpermatogenesisSperm MotilityChromosomes, Human, YSexual Behavior, AnimalTestisMesteroloneFertilityFertilizationAsthenozoospermiaHydrocarbons, BrominatedSemen AnalysisSperm HeadSemenReproductionVaricoceleSperm CapacitationSperm Injections, IntracytoplasmicTestosteroneReproductive Techniques, AssistedSperm MaturationSeminal Plasma ProteinsEpididymisSperm-Ovum InteractionsAcrosomeY ChromosomeSertoli Cell-Only SyndromePregnancySex Chromosome Disorders of Sex DevelopmentFertilization in VitroAndrologyProtaminesOrchitisSex Chromosome AberrationsEjaculationVasovasostomyAbnormal KaryotypeReproductive TechniquesSperm RetrievalSpermatidsSertoli CellsSperm TransportPregnancy RateZona PellucidaInsemination, ArtificialFallopian Tube DiseasesSeminiferous TubulesSperm TailSperm BanksChromosome DeletionTesticular DiseasesKlinefelter SyndromeSperm MidpieceReproductive MedicineSemen PreservationCryopreservationKartagener SyndromeGenital Diseases, MaleCryptorchidismFertility Agents, MalePregnancy OutcomeInseminationFollicle Stimulating HormoneSequence Tagged SitesEndometriosisCiliary Motility DisordersOocytesMeiosisHysterosalpingographySpermatogoniaEjaculatory DuctsAcrosome ReactionVas DeferensHypogonadismGenitalia, MaleAxonemal DyneinsSpermatocytesEpididymitisMicroinjectionsMicrosurgeryCase-Control StudiesGerm CellsDNA FragmentationClomipheneGene DeletionEmbryo TransferMutationUrologic Surgical Procedures, MaleChromosome AberrationsAneuploidyTesticular NeoplasmsScrotumFallopian Tubes