OocytesStem CellsEmbryo, MammalianMeiosisBlastocystEmbryonic Stem CellsOogenesisEmbryonic DevelopmentEmbryo ImplantationStem Cell TransplantationEmbryo ResearchHematopoietic Stem CellsBlastomeresPluripotent Stem CellsFertilization in VitroAdult Stem CellsMammalsMetaphaseFertilizationEmbryo, NonmammalianZona PellucidaZygoteCell DifferentiationMeiotic Prophase IEmbryonic and Fetal DevelopmentMolecular Sequence DataInduced Pluripotent Stem CellsGene Expression Regulation, DevelopmentalPolar BodiesCryopreservationEmbryo Culture TechniquesPregnancyChick EmbryoEgg ProteinsCells, CulturedHematopoietic Stem Cell TransplantationStem Cell NicheParthenogenesisNeural Stem CellsSperm-Ovum InteractionsPersonhoodMaturation-Promoting FactorEmbryo TransferCell LineageMicroinjectionsAneuploidyBeginning of Human LifeBase SequenceOvumMultipotent Stem CellsIn Vitro Oocyte Maturation TechniquesCryoprotective AgentsEmbryo DispositionAmino Acid SequenceCloning, MolecularMesenchymal Stem Cell TransplantationRNA, MessengerExtreme ColdCell LineMesenchymal Stromal CellsStem Cell FactorNuclear Transfer TechniquesChromosome SegregationTime FactorsGenes, mosSpindle ApparatusCumulus CellsSpermatozoaCell Culture TechniquesSignal TransductionPregnancy RateOvarySperm Injections, IntracytoplasmicMice, Inbred ICRXenopus laevisChromosomes, MammalianCloning, OrganismOocyte DonationMice, Inbred C57BLCell NucleusMorulaOctamer Transcription Factor-3Totipotent Stem CellsCulture TechniquesOvarian FolliclePreimplantation DiagnosisCyclin B1CattleStem Cell ResearchEctogenesisModels, BiologicalTranscription FactorsValue of LifeGerm LayersMosaicismXenopusLifeCell ProliferationCulture MediaGranulosa Cells