Sex Determination ProcessesOocytesOogenesisCaenorhabditis elegansCaenorhabditis elegans ProteinsSpermatogenesisSpermatozoaSperm HeadSperm CountSperm CapacitationSperm-Ovum InteractionsFertilizationSperm Injections, IntracytoplasmicSperm MaturationOocyte DonationSperm TransportMeiosisOocyte RetrievalXenopus laevisAcrosomeZona PellucidaInfertility, MaleCryopreservationOvumSperm MidpieceSemen PreservationSemenIn Vitro Oocyte Maturation TechniquesMicroinjectionsSperm BanksEpididymisXenopusFertilityMetaphaseSemen AnalysisTestisBlastocystCumulus CellsParthenogenesisEgg ProteinsEmbryonic DevelopmentEjaculationPregnancyZygoteOvaryCryoprotective AgentsOligospermiaSperm WhaleEmbryo TransferPregnancy RateMaturation-Promoting FactorEmbryo Culture TechniquesCattleCytoplasmFollicular FluidMolecular Sequence DataReproductive Techniques, AssistedCell NucleusInsemination, ArtificialCleavage Stage, OvumOvulation InductionSeminal Plasma ProteinsRNA, ComplementaryProtaminesEmbryonic and Fetal DevelopmentSea UrchinsEmbryo, MammalianSwineInfertility, FemaleAsthenozoospermiaFallopian TubesAneuploidyReproductive TechniquesRNA, MessengerOvulationVitelline MembraneNuclear Transfer TechniquesAmino Acid SequencePolar BodiesVitrificationChorionic GonadotropinProto-Oncogene Proteins c-mosInfertilityReproductionAzoospermiaCells, CulturedProgesteroneTime FactorsCell MembraneChromatinInseminationChromosomesPregnancy OutcomeMice, Inbred ICRSexual Behavior, AnimalEthylene GlycolMorulaGranulosa CellsBase SequenceXenopus Proteins