OocytesXenopus laevisXenopusRanidaeMicroinjectionsOvumAnuraBase SequenceMolecular Sequence DataRNA, MessengerPoly AOogenesisProtein BiosynthesisOocyte DonationRana pipiensOocyte RetrievalGenesMeiosisTranscription, GeneticAmino Acid SequenceCloning, MolecularIn Vitro Oocyte Maturation TechniquesRana esculentaRana catesbeianaFertilizationMetaphaseRana ridibundaCumulus CellsBlastocystParthenogenesisSperm-Ovum InteractionsOvaryCryopreservationEmbryonic DevelopmentSperm Injections, IntracytoplasmicEmbryo TransferMaturation-Promoting FactorZona PellucidaSpermatozoaZygoteCleavage Stage, OvumEmbryo Culture TechniquesMembrane PotentialsRNA, ComplementaryEgg ProteinsPregnancyNuclear Transfer TechniquesXenopus ProteinsCytoplasmMusclesFollicular FluidOvulation InductionAmphibian ProteinsProto-Oncogene Proteins c-mosCryoprotective AgentsCell NucleusVitrificationTime FactorsEmbryo, MammalianRanavirusEmbryonic and Fetal DevelopmentPolar BodiesCalciumChorionic GonadotropinPregnancy RateInfertility, FemaleOvulationCells, CulturedElectrophysiologyGranulosa CellsCattleProgesteroneKineticsBufonidaeNeuromuscular JunctionSodiumMorulaGenes, mosMeiotic Prophase IChromosomesSpindle ApparatusMotor EndplateReproductive Techniques, AssistedGene Expression Regulation, DevelopmentalSwineEthylene GlycolVitellogenesisElectric ConductivityPotassiumEmbryo, NonmammalianBlastomeresProphasePatch-Clamp TechniquesGonadotropinsSuperovulationGrowth Differentiation Factor 9Cell MembraneIon ChannelsMicrotubulesMuscle Contraction