Embryo, MammalianEmbryo, NonmammalianClone CellsChick EmbryoEmbryo ImplantationBlastocystEmbryonic DevelopmentMolecular Sequence DataBase SequenceGene Expression Regulation, DevelopmentalEmbryo LossCloning, MolecularEmbryonic and Fetal DevelopmentAmino Acid SequenceFertilization in VitroCleavage Stage, OvumBlastomeresPregnancyEmbryo DispositionZygoteZebrafishRNA, MessengerMorulaIn Situ HybridizationDNA, ComplementaryGastrulaCryopreservationBody PatterningOocytesCloning, OrganismDNAMorphogenesisMutationCulture TechniquesMesodermPhenotypeEmbryo ResearchSingle Embryo TransferNuclear Transfer TechniquesSequence Homology, Amino AcidTime FactorsCell LineEctogenesisSequence Analysis, DNAEctodermTranscription FactorsPolymerase Chain ReactionZebrafish ProteinsPregnancy RateSpecies SpecificityGene ExpressionCell DifferentiationHomeodomain ProteinsSeedsDrosophilaXenopus ProteinsPhylogenyDrosophila ProteinsSequence Homology, Nucleic AcidNucleic Acid HybridizationTranscription, GeneticSperm Injections, IntracytoplasmicCattleDNA PrimersEndodermParthenogenesisSea UrchinsMice, Inbred C57BLAnimals, Genetically ModifiedFetal ViabilityChimeraGenesEmbryonic InductionBlastodermSequence AlignmentSignal TransductionChromosome MappingFertilizationCell DivisionMice, Inbred StrainsXenopus laevisXenopusDNA-Binding ProteinsMicroinjectionsNervous SystemPreimplantation DiagnosisBlotting, NorthernReverse Transcriptase Polymerase Chain ReactionCulture MediaNotochordGene Expression RegulationModels, BiologicalYolk SacBlotting, SouthernImmunohistochemistrySuperovulationTransfectionMice, Inbred ICRCell NucleusOvum