Sperm Injections, IntracytoplasmicFertilization in VitroFertilizationSperm HeadSpermatozoaSperm CountInfertility, MaleMicroinjectionsOligospermiaEmbryo TransferOocytesSperm-Ovum InteractionsSperm CapacitationPregnancyPregnancy RateCryopreservationReproductive TechniquesSemen PreservationSperm RetrievalSperm MotilityPregnancy OutcomeSperm MaturationZona PellucidaAcrosomeMicromanipulationEjaculationInjectionsSemenCleavage Stage, OvumTestisInsemination, ArtificialZygoteEmbryo ImplantationEpididymisCytoplasmOvumReproductive Techniques, AssistedInfertilitySperm TransportBlastocystAzoospermiaOvulation InductionInfertility, FemaleSemen AnalysisEmbryonic DevelopmentEmbryonic and Fetal DevelopmentFertilityOocyte RetrievalEmbryo, MammalianPregnancy, MultipleY ChromosomeSuctionSperm MidpieceKlinefelter SyndromeSpermatidsSperm TailVasovasostomySperm BanksSea UrchinsLive BirthEmbryo Culture TechniquesMenotropinsAbortion, SpontaneousTripletsAcrosome ReactionParthenogenesisSex Chromosome AberrationsFollicle Stimulating HormoneInseminationChromosome AberrationsInsemination, Artificial, HomologousFollicular FluidAneuploidyFallopian TubesCongenital AbnormalitiesCryoprotective AgentsProtaminesEgg ProteinsMetaphaseMicroscopy, ElectronVasectomyMicrosurgeryMeiosisPovidoneSpermatogenesisTime FactorsCell NucleusOocyte DonationOvarian Hyperstimulation SyndromeChorionic GonadotropinKaryotypingOvarian FollicleFollicle Stimulating Hormone, HumanTwinsIn Vitro Oocyte Maturation TechniquesPreimplantation DiagnosisBlastomeresDNA FragmentationRetrospective StudiesVitelline Membrane