OocytesOogenesisOocyte DonationOocyte RetrievalXenopus laevisMeiosisIn Vitro Oocyte Maturation TechniquesXenopusMicroinjectionsFertilizationMetaphaseCumulus CellsParthenogenesisBlastocystOvumSperm-Ovum InteractionsCryopreservationOvarySperm Injections, IntracytoplasmicEmbryonic DevelopmentEmbryo TransferZona PellucidaMaturation-Promoting FactorSpermatozoaZygoteCleavage Stage, OvumEmbryo Culture TechniquesRNA, ComplementaryPregnancyEgg ProteinsNuclear Transfer TechniquesFollicular FluidOvulation InductionCytoplasmProto-Oncogene Proteins c-mosCryoprotective AgentsVitrificationCell NucleusPolar BodiesEmbryo, MammalianRNA, MessengerEmbryonic and Fetal DevelopmentPregnancy RateInfertility, FemaleChorionic GonadotropinMolecular Sequence DataOvulationGranulosa CellsCells, CulturedXenopus ProteinsCattleMorulaProgesteroneMeiotic Prophase IReproductive Techniques, AssistedSpindle ApparatusChromosomesEthylene GlycolAmino Acid SequenceVitellogenesisSwineGenes, mosProphaseBase SequenceGonadotropinsSuperovulationGrowth Differentiation Factor 9BlastomeresBone Morphogenetic Protein 15Gene Expression Regulation, DevelopmentalCDC2 Protein KinaseTime FactorsSperm HeadAneuploidyCloning, MolecularMicrotubulesCulture MediaReproductive TechniquesEmbryo ImplantationMembrane PotentialsMice, Inbred ICRInfertilityEctogenesisMicroscopy, ConfocalGonadotropins, EquinePatch-Clamp TechniquesCyclin BFertilityCell AgingProtein BiosynthesisCholestenesMice, Inbred StrainsPropylene GlycolKineticsRecombinant ProteinsPregnancy OutcomeTissue and Organ HarvestingCalciumCell MembraneEstradiol