AzoospermiaSperm Injections, IntracytoplasmicOligospermiaInfertility, MaleFertilization in VitroSpermatozoaSperm RetrievalMicroinjectionsSperm CountEmbryo TransferSperm HeadReproductive TechniquesTestisPregnancy RatePregnancyCryopreservationOocytesSperm MotilityChromosomes, Human, YSemen PreservationSpermatogenesisEjaculationPregnancy OutcomeSemenMicromanipulationInjectionsFertilizationY ChromosomeKlinefelter SyndromeEpididymisSex Chromosome AberrationsVasovasostomyCytoplasmSperm-Ovum InteractionsEmbryo ImplantationSperm MaturationSuctionSeminal Plasma ProteinsInsemination, ArtificialSemen AnalysisReproductive Techniques, AssistedSpermatidsMicrosurgeryCleavage Stage, OvumSperm CapacitationTesticular DiseasesVasectomyInfertilityFollicle Stimulating HormoneVas DeferensZona PellucidaAcrosomePregnancy, MultipleBlastocystSex Chromosome Disorders of Sex DevelopmentFertilityZygoteOvulation InductionOocyte RetrievalChromosome AberrationsEmbryo, MammalianEmbryonic and Fetal DevelopmentVaricoceleInfertility, FemaleTissue and Organ HarvestingEmbryonic DevelopmentBiopsyContraceptive Agents, MaleKaryotypingTripletsSperm TailAneuploidyChromosome DeletionSequence Tagged SitesAbortion, SpontaneousCongenital AbnormalitiesLive BirthTestosteroneMenotropinsInsemination, Artificial, HomologousSperm TransportEmbryo Culture TechniquesSpecimen HandlingXYY KaryotypeRetrospective StudiesIn Situ Hybridization, FluorescenceMicroscopy, ElectronMeiosisAsthenozoospermiaGenetic LociEjaculatory DuctsDNA FragmentationDigestive System AbnormalitiesPovidoneSperm MidpieceMosaicismInseminationParthenogenesisMetaphaseTime Factors