FertilizationFertilization in VitroSpermatozoaSperm-Ovum InteractionsOvumOocytesEmbryo TransferZygoteZona PellucidaSperm Injections, IntracytoplasmicSperm MotilityPregnancySea UrchinsPregnancy RateAcrosomeCleavage Stage, OvumAcrosome ReactionFertilizersSperm CapacitationInfertility, FemaleEmbryonic DevelopmentCryopreservationBlastocystOvulation InductionInfertility, MaleInfertilityEgg ProteinsMicroinjectionsEmbryo ImplantationFertilityVitelline MembraneEmbryonic and Fetal DevelopmentParthenogenesisSperm HeadPregnancy OutcomeSemen PreservationOogenesisOocyte RetrievalInsemination, ArtificialUrochordataFollicular FluidReproductive TechniquesStarfishEmbryo, MammalianFallopian TubesMeiosisOvuleOvarian FollicleOvulationMenotropinsChorionic GonadotropinSemenOocyte DonationReproductive Techniques, AssistedCumulus CellsAcrosinEmbryo Culture TechniquesSperm CountEchinodermataSperm TransportInseminationSuperovulationReproductionOvaryIn Vitro Oocyte Maturation TechniquesLive BirthEpididymisFollicle Stimulating HormoneOligospermiaPollen TubeMicromanipulationEmbryo, NonmammalianPregnancy, MultipleFallopian Tube DiseasesTime FactorsSperm TailContraception, ImmunologicBlastomeresOvarian Hyperstimulation SyndromeMetaphaseEjaculationSpermatidsGerm Cells, PlantTestisCattleCytoplasmFertility Agents, FemaleCryoprotective AgentsSeminal Plasma ProteinsPollenCalciumMolecular Sequence DataSeedsSperm MaturationBufo arenarumAbortion, SpontaneousSemen AnalysisSurrogate MothersMorulaGonadotropins