Embryo, NonmammalianEmbryo, MammalianGrowth ConesGene Expression Regulation, DevelopmentalBlastocystEmbryonic DevelopmentChick EmbryoVitellinsGastrulaCell AggregationCell DifferentiationCaenorhabditis elegansBlastomeresXenopusXenopus ProteinsEmbryonic Stem CellsXenopus laevisVideo RecordingCells, CulturedMolecular Sequence DataTeratomaCaenorhabditis elegans ProteinsCarcinoma, EmbryonalMitosisOvumCell LineageTeratocarcinomaBlastulaTime FactorsMovementZebrafishTranscription FactorsCleavage Stage, OvumEndodermMorphogenesisEmbryonal Carcinoma Stem CellsOocytesModels, BiologicalMoving and Lifting PatientsCell MovementCell LineCell DivisionSwimmingLysergic AcidNuclear Transfer TechniquesFlight, AnimalEmbryonic and Fetal DevelopmentCell CycleCDC2 Protein KinaseSignal TransductionStarfishBiomechanical PhenomenaBase SequenceAmino Acid SequenceRNA, MessengerDipteraOctamer Transcription Factor-3LocomotionSea UrchinsZygoteRotationQuailIridovirusIn Situ HybridizationUrochordataTotipotent Stem CellsGait AtaxiaBody PatterningCell NucleusFertilizationSalamandridaeStem CellsGastrulationEctodermMesodermInsect Hormonescdc25 PhosphatasesPluripotent Stem CellsAnimals, Genetically ModifiedMutationNuclear ProteinsCoturnixLarvaExtremitiesDNA-Binding ProteinsNeuronsNervous SystemCell AdhesionDrosophila melanogasterTranscription, GeneticChimeraDrosophila ProteinsCell Cycle ProteinsNeural CrestCyclin BHeadSemaphorin-3APleurodelesMorulaPregnancy