Infertility, MaleAzoospermiaOligospermiaSperm CountChromosomes, Human, YSpermatogenesisAsthenozoospermiaSpermatozoaInfertilitySperm MotilityTestisInfertility, FemaleSex Chromosome AberrationsSemenMesteroloneSeminal Plasma ProteinsSemen AnalysisSex Chromosome Disorders of Sex DevelopmentSperm RetrievalSperm Injections, IntracytoplasmicKlinefelter SyndromeSequence Tagged SitesVaricoceleY ChromosomeHydrocarbons, BrominatedFertilitySperm HeadChromosome DeletionTestosteroneSperm CapacitationTesticular DiseasesPregnancyEpididymisSperm MaturationReproductive TechniquesAneuploidyVasovasostomyReproductive Techniques, AssistedKaryotypingVasectomyMicrosurgerySemen PreservationEjaculationChromosome AberrationsPregnancy RateFertilization in VitroFertilizationCryopreservationContraceptive Agents, MaleIn Situ Hybridization, FluorescenceSpermatidsFollicle Stimulating HormoneSperm-Ovum InteractionsVas DeferensEmbryo TransferSuctionSperm TransportTissue and Organ HarvestingXYY KaryotypeMicroinjectionsAcrosomeEjaculatory DuctsFallopian Tube DiseasesPolymerase Chain ReactionSertoli CellsPregnancy OutcomeSperm BanksGenetic LociInsemination, ArtificialBiopsySperm MidpieceAbnormal KaryotypeSeminiferous TubulesCryptorchidismZona PellucidaEndometriosisOocytesInhibinsEpitestosteroneHysterosalpingographyEpididymitisEmbryo ImplantationGenital Diseases, MaleHypogonadismTuberculosis, Male GenitalGene DeletionMeiosisRNA-Binding ProteinsLuteinizing HormoneClomiphene