Chick EmbryoEmbryo, MammalianEmbryo, NonmammalianEmbryo ImplantationChickensGene Expression Regulation, DevelopmentalEmbryonic DevelopmentBlastocystAllantoisMesodermMorphogenesisIn Situ HybridizationQuailCulture TechniquesGastrulaEmbryonic and Fetal DevelopmentEctodermAvian ProteinsChorionChorioallantoic MembraneEmbryo LossCartilageEmbryonic InductionBlastodermCleavage Stage, OvumBody PatterningSomitesCoturnixFertilization in VitroNotochordNeural CrestMolecular Sequence DataBlastomeresPregnancyNervous SystemCell DifferentiationHomeodomain ProteinsTime FactorsRhombencephalonLathyrismExtraembryonic MembranesEndodermZebrafishMicroscopy, ElectronChimeraAmino Acid SequenceRNA, MessengerEmbryo DispositionTranscription FactorsZygoteBase SequenceCells, CulturedMorulaHeartMusclesLimb BudsExtremitiesNeural TubeMicroscopy, Electron, ScanningWingCryopreservationFibroblast Growth Factor 8Zebrafish ProteinsFibroblast Growth FactorsYolk SacBursa of FabriciusElectroporationOocytesDicarbethoxydihydrocollidineOrganizers, EmbryonicBone Morphogenetic ProteinsAvian Sarcoma VirusesImmunohistochemistryTissue TransplantationMesonephrosCell MovementHedgehog ProteinsXenopus ProteinsSignal TransductionSpinal CordCentral Nervous SystemEmbryo Research5-Aminolevulinate SynthetaseCollagenSingle Embryo TransferCloning, OrganismAminopropionitrileAllylisopropylacetamideBranchial RegionEgg ShellCulture MediaCell DivisionFibroblastsEctogenesisRetinaProteinsOrgan Culture TechniquesGenes, HomeoboxMicroinjectionsNuclear Transfer Techniques