Stem CellsEmbryo, MammalianCloning, MolecularEmbryo, NonmammalianBlastocystEmbryonic DevelopmentEmbryo ImplantationEmbryonic Stem CellsChick EmbryoBlastomeresEmbryo ResearchStem Cell TransplantationGene Expression Regulation, DevelopmentalPluripotent Stem CellsEmbryonic and Fetal DevelopmentFertilization in VitroHematopoietic Stem CellsMolecular Sequence DataAdult Stem CellsCell DifferentiationPregnancyBase SequenceZygoteAmino Acid SequenceEmbryo Culture TechniquesInduced Pluripotent Stem CellsCryopreservationOocytesCloning, OrganismEmbryo DispositionHematopoietic Stem Cell TransplantationStem Cell NicheCell LineageNeural Stem CellsPersonhoodMorulaBeginning of Human LifeCleavage Stage, OvumEmbryo LossMultipotent Stem CellsRNA, MessengerEmbryo TransferCulture TechniquesIn Situ HybridizationMesenchymal Stem Cell TransplantationMesenchymal Stromal CellsOctamer Transcription Factor-3EctogenesisDNA, ComplementaryCells, CulturedMesodermSequence Homology, Amino AcidTotipotent Stem CellsStem Cell FactorCell LineHomeodomain ProteinsTranscription FactorsPregnancy RateCell Culture TechniquesBody PatterningGerm LayersTime FactorsGastrulaEmbryologyPreimplantation DiagnosisGene ExpressionZebrafishGerm CellsSperm Injections, IntracytoplasmicPhenotypeMorphogenesisMosaicismFertilizationMutationSignal TransductionSingle Embryo TransferImmunohistochemistryNuclear Transfer TechniquesModels, BiologicalStem Cell ResearchCulture MediaXenopus ProteinsLifeValue of LifeResearch Embryo CreationMice, Inbred C57BLDrosophila ProteinsEctodermTrophoblastsEndodermPlant StemsDNADrosophilaTranscription, GeneticGene Expression ProfilingReverse Transcriptase Polymerase Chain ReactionCell DivisionParthenogenesisAnatomy, ArtisticFetal Stem Cells