Embryo, MammalianEmbryo, NonmammalianClone CellsChick EmbryoGuinea PigsEmbryo ImplantationBlastocystEmbryonic DevelopmentMolecular Sequence DataBase SequenceGene Expression Regulation, DevelopmentalCloning, MolecularEmbryonic and Fetal DevelopmentEmbryo LossAmino Acid SequenceFertilization in VitroPregnancySwineCleavage Stage, OvumBlastomeresRNA, MessengerEmbryo DispositionZygoteZebrafishMorulaIn Situ HybridizationDNA, ComplementaryCloning, OrganismSwine DiseasesOocytesCryopreservationGastrulaBody PatterningDNATime FactorsMutationCulture TechniquesSus scrofaMorphogenesisPhenotypeSpecies SpecificityMesodermSequence Analysis, DNAEmbryo ResearchPolymerase Chain ReactionSequence Homology, Amino AcidSingle Embryo TransferCell LineNuclear Transfer TechniquesEctogenesisEctodermTranscription FactorsZebrafish ProteinsGene ExpressionPhylogenyCattleCell DifferentiationPregnancy RateHomeodomain ProteinsSeedsSequence Homology, Nucleic AcidDrosophilaDNA PrimersNucleic Acid HybridizationXenopus ProteinsDrosophila ProteinsTranscription, GeneticAnimals, Genetically ModifiedSperm Injections, IntracytoplasmicParthenogenesisEndodermMice, Inbred C57BLSequence AlignmentChimeraFetal ViabilitySea UrchinsGenesChromosome MappingEmbryonic InductionSignal TransductionAnimal FeedBlastodermFertilizationCell DivisionReverse Transcriptase Polymerase Chain ReactionMice, Inbred StrainsXenopus laevisDNA-Binding ProteinsMicroinjectionsXenopusImmunohistochemistryModels, BiologicalGene Expression RegulationBlotting, NorthernNervous SystemCulture MediaPreimplantation DiagnosisChickensNotochordBlotting, Southern