HorsesEmbryo Culture TechniquesEmbryo TransferEmbryonic DevelopmentPregnancyEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEmbryo ImplantationBlastocystCloning, MolecularMolecular Sequence DataBase SequenceGene Expression Regulation, DevelopmentalEmbryo LossEmbryonic and Fetal DevelopmentAmino Acid SequenceFertilization in VitroCleavage Stage, OvumBlastomeresCloning, OrganismEmbryo DispositionMorulaZebrafishZygoteOocytesSequence Homology, Amino AcidIn Situ HybridizationNuclear Transfer TechniquesGastrulaCryopreservationRNA, MessengerBody PatterningDNA, ComplementaryMorphogenesisCulture TechniquesEmbryo ResearchSingle Embryo TransferMesodermEctogenesisMutationZebrafish ProteinsEctodermTranscription FactorsPlasmidsPregnancy RateGenes, BacterialEscherichia coliSequence AlignmentGene ExpressionXenopus ProteinsTranscription, GeneticRestriction MappingHomeodomain ProteinsSeedsSperm Injections, IntracytoplasmicXenopus laevisParthenogenesisDNADrosophilaFetal ViabilityPhenotypeXenopusEndodermDrosophila ProteinsGenesSea UrchinsDNA PrimersEmbryonic InductionRecombinant ProteinsAnimals, Genetically ModifiedSequence Analysis, DNAMicroinjectionsSequence Homology, Nucleic AcidNucleic Acid HybridizationBlastodermCell DifferentiationFertilizationCell LineTime FactorsCattlePreimplantation DiagnosisDNA-Binding ProteinsChimeraPolymerase Chain ReactionNervous SystemNotochordDNA Restriction EnzymesDrosophila melanogasterYolk SacChromosome MappingCulture MediaSuperovulationSignal TransductionCell NucleusSomitesDNA, RecombinantOvumBlotting, NorthernBlotting, Southern