Sperm Injections, IntracytoplasmicSperm CountSpermatozoaSpermatogenesisFertilization in VitroTestisMicroinjectionsInfertility, MaleSperm HeadOligospermiaEmbryo TransferSertoli CellsEpididymisSeminiferous EpitheliumPregnancyPregnancy RateReproductive TechniquesSperm MotilityOocytesSperm RetrievalCryopreservationInjectionsSeminiferous TubulesMicromanipulationOrgan SizePregnancy OutcomeFertilizationSemen PreservationSexual MaturationSperm-Ovum InteractionsEjaculationTestosteroneFollicle Stimulating HormoneProphaseCytoplasmCleavage Stage, OvumEmbryo ImplantationInsemination, ArtificialSperm CapacitationSemenReproductive Techniques, AssistedCell CountAzoospermiaSperm MaturationInfertilityY ChromosomeZona PellucidaAcrosomePregnancy, MultipleBlastocystZygoteOvulation InductionOocyte RetrievalSuctionEmbryo, MammalianEmbryonic and Fetal DevelopmentKlinefelter SyndromeInfertility, FemaleSemen AnalysisEmbryonic DevelopmentReproductionVasovasostomyTripletsSex Chromosome AberrationsSpermatidsSperm TailChromosome AberrationsAbortion, SpontaneousBody WeightCongenital AbnormalitiesLive BirthFertilityMenotropinsInsemination, Artificial, HomologousSperm TransportEmbryo Culture TechniquesAneuploidyMicrosurgeryMicroscopy, ElectronVasectomyKaryotypingDigestive System AbnormalitiesPovidoneSperm MidpieceTime FactorsInseminationParthenogenesisInjections, IntravenousInjections, IntramuscularMetaphaseTwinsInclusion BodiesFollicle Stimulating Hormone, HumanFollicular FluidRetrospective StudiesCryoprotective AgentsCell NucleusPreimplantation DiagnosisVas DeferensHorses