HopeEmbryo, NonmammalianEmbryo, MammalianBlastocystEmbryonic DevelopmentGene Expression Regulation, DevelopmentalVitellinsGastrulaCell AggregationBlastomeresEmbryonic Stem CellsXenopus ProteinsCell DifferentiationCaenorhabditis elegansChick EmbryoTeratomaCarcinoma, EmbryonalXenopusMitosisXenopus laevisMolecular Sequence DataOvumCell LineageTeratocarcinomaBlastulaCleavage Stage, OvumEndodermEmbryonal Carcinoma Stem CellsOocytesCells, CulturedCaenorhabditis elegans ProteinsCell CycleNuclear Transfer TechniquesCDC2 Protein KinaseStarfishCell LineCell DivisionTranscription FactorsMorphogenesisZebrafishDipteraOctamer Transcription Factor-3Base SequenceSea UrchinsZygoteQuailIridovirusEmbryonic and Fetal DevelopmentUrochordataTotipotent Stem CellsAmino Acid SequenceFertilizationSalamandridaeStem CellsGastrulationEctodermMesodermInsect Hormonescdc25 PhosphatasesPluripotent Stem CellsRNA, MessengerCoturnixCell NucleusChimeraCell Cycle ProteinsSignal TransductionNeural CrestIn Situ HybridizationCyclin BTime FactorsPleurodelesMorulaBlastodermPregnancyGerm CellsNuclear ProteinsNotochordBody PatterningCell MovementMutationDNADNA-Binding ProteinsZebrafish ProteinsTranscription, GeneticEmbryo LossAnimals, Genetically ModifiedModels, BiologicalGenes, HelminthTrophoblastsDrosophila ProteinsCell AdhesionEmbryonic InductionHomeodomain ProteinsDrosophilaPhenotypeGene Expression RegulationHelminth ProteinsDrosophila melanogasterCloning, MolecularFetal Proteins