AzoospermiaOligospermiaInfertility, MaleSperm CountChromosomes, Human, YSperm MotilityAsthenozoospermiaSpermatogenesisSpermatozoaTestisSex Chromosome AberrationsMesteroloneSemenSeminal Plasma ProteinsSemen AnalysisSex Chromosome Disorders of Sex DevelopmentSperm RetrievalSperm Injections, IntracytoplasmicHydrocarbons, BrominatedSequence Tagged SitesKlinefelter SyndromeY ChromosomeVaricoceleSperm HeadFertilitySperm CapacitationChromosome DeletionTestosteroneTesticular DiseasesGastrointestinal MotilitySperm MaturationEpididymisAneuploidySemen PreservationVasovasostomyKaryotypingVasectomyMicrosurgeryEjaculationChromosome AberrationsCryopreservationReproductive TechniquesContraceptive Agents, MalePregnancyIn Situ Hybridization, FluorescenceFertilizationSpermatidsSperm TransportSuctionVas DeferensSperm-Ovum InteractionsAcrosomeTissue and Organ HarvestingXYY KaryotypePregnancy RateMicroinjectionsFollicle Stimulating HormonePolymerase Chain ReactionSperm MidpieceGenetic LociEjaculatory DuctsBiopsyEmbryo TransferFertilization in VitroSertoli CellsSperm BanksCell MovementEpitestosteroneTuberculosis, Male GenitalFlagellaPregnancy OutcomeReproductive Techniques, AssistedZona PellucidaSeminiferous TubulesGene DeletionInhibinsInsemination, ArtificialCryptorchidismGonadal Dysgenesis, MixedEpididymitisRNA-Binding ProteinsGenital Diseases, Male