AzoospermiaOligospermiaInfertility, MaleSperm CountChromosomes, Human, YAsthenozoospermiaSpermatogenesisSpermatozoaTestisSperm MotilitySex Chromosome AberrationsMesteroloneSeminal Plasma ProteinsSemenSemen AnalysisSex Chromosome Disorders of Sex DevelopmentSperm RetrievalSperm Injections, IntracytoplasmicSequence Tagged SitesKlinefelter SyndromeHydrocarbons, BrominatedY ChromosomeVaricoceleSperm HeadFertilityChromosome DeletionTestosteroneSperm CapacitationTesticular DiseasesSperm MaturationEpididymisAneuploidyVasovasostomyKaryotypingMicrosurgeryVasectomySemen PreservationChromosome AberrationsEjaculationPregnancyReproductive TechniquesContraceptive Agents, MaleIn Situ Hybridization, FluorescenceCryopreservationFertilizationSpermatidsSuctionVas DeferensSperm TransportTissue and Organ HarvestingXYY KaryotypePregnancy RateSperm-Ovum InteractionsMicroinjectionsFollicle Stimulating HormonePolymerase Chain ReactionAcrosomeEjaculatory DuctsGenetic LociSperm MidpieceEmbryo TransferBiopsySertoli CellsFertilization in VitroSperm BanksEpitestosteronePregnancy OutcomeTuberculosis, Male GenitalSeminiferous TubulesReproductive Techniques, AssistedInhibinsZona PellucidaCryptorchidismGene DeletionGonadal Dysgenesis, MixedEpididymitisRNA-Binding ProteinsInsemination, Artificial