VertebratesEmbryo, NonmammalianEmbryo, MammalianZebrafishChick EmbryoGene Expression Regulation, DevelopmentalBody PatterningEmbryonic DevelopmentBlastocystGastrulaZebrafish ProteinsEmbryonic InductionEmbryonic and Fetal DevelopmentEmbryo ImplantationBlastomeresXenopus ProteinsMorphogenesisMesodermMorulaCleavage Stage, OvumSomitesEmbryo Culture TechniquesIn Situ HybridizationNeural CrestCryopreservationNodal ProteinFertilization in VitroXenopusOrganizers, EmbryonicHomeodomain ProteinsCloning, OrganismEctodermPregnancyMolecular Sequence DataNotochordXenopus laevisVitrificationEmbryo TransferBase SequenceNuclear Transfer TechniquesBone Morphogenetic ProteinsGoosecoid ProteinNervous SystemQuailTranscription FactorsMorpholinosWnt ProteinsCell DifferentiationSignal TransductionAmino Acid SequenceAnimals, Genetically ModifiedCiona intestinalisEmbryologyGenes, HomeoboxAvian ProteinsEndodermOocytesRhombencephalonExtremitiesNeural PlateFetal ProteinsPhenotypeCulture TechniquesFibroblast Growth FactorsT-Box Domain ProteinsDevelopmental BiologyTime FactorsPregnancy RateGastrulationFibroblast Growth Factor 8Embryo LossSequence Homology, Amino AcidModels, BiologicalTailCoturnixDrosophila ProteinsTretinoinHedgehog ProteinsDNA-Binding ProteinsDrosophilaOligoribonucleotides, AntisenseHeadTrans-ActivatorsBiological EvolutionLeft-Right Determination FactorsMutationBranchial RegionAxisBone Morphogenetic Protein 4Cell LineageRNA, MessengerBlastulaCell MovementMyogenic Regulatory Factor 5Cloning, MolecularReceptors, NotchEvolution, MolecularSequence AlignmentRetinal DehydrogenaseChordata, Nonvertebrate