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Fertilization in VitroSperm Injections, IntracytoplasmicFertilizationSpermatozoaEmbryo TransferInfertility, MaleOocytesMicroinjectionsPregnancy RatePregnancySperm-Ovum InteractionsOligospermiaSperm HeadCryopreservationSperm CountReproductive TechniquesSperm MotilityPregnancy OutcomeInfertility, FemaleSemen PreservationOvulation InductionSperm RetrievalZona PellucidaInfertilityCleavage Stage, OvumSperm CapacitationEmbryo ImplantationOocyte RetrievalZygoteBlastocystMicromanipulationReproductive Techniques, AssistedInsemination, ArtificialAcrosomeInjectionsEmbryonic DevelopmentPregnancy, MultipleEjaculationOvumSemenLive BirthEmbryo, MammalianEmbryonic and Fetal DevelopmentCytoplasmTestisEmbryo Culture TechniquesFollicular FluidEpididymisAzoospermiaMenotropinsFertilityAcrosome ReactionFollicle Stimulating HormoneSemen AnalysisSperm MaturationParthenogenesisOocyte DonationSuctionAbortion, SpontaneousChorionic GonadotropinY ChromosomeOvarian FollicleIn Vitro Oocyte Maturation TechniquesTripletsPreimplantation DiagnosisOvarian Hyperstimulation SyndromeCongenital AbnormalitiesOvarySpermatidsCryoprotective AgentsSperm TailBlastomeresKlinefelter SyndromeFallopian TubesCumulus CellsInsemination, Artificial, HomologousAneuploidyTwinsChromosome AberrationsGonadotropin-Releasing HormoneMaternal AgeSperm TransportVasovasostomyMetaphaseFallopian Tube DiseasesFollicle Stimulating Hormone, HumanGonadotropinsSex Chromosome AberrationsRetrospective StudiesBuserelinMeiosisOogenesisPovidoneTime FactorsSea UrchinsSpermatogenesisSuperovulationZygote Intrafallopian TransferFertility Agents, FemaleInsemination