Embryonic DevelopmentEmbryo, MammalianGene Expression Regulation, DevelopmentalEmbryonic and Fetal DevelopmentHeterogeneous-Nuclear Ribonucleoprotein Group MBlastocystIn Situ HybridizationYolk SacPregnancyMice, KnockoutMice, Inbred ICRMesodermHomeodomain ProteinsMolecular Sequence DataHomozygoteRNA, MessengerTissue DistributionMice, TransgenicCell DifferentiationTranscription FactorsPhenotypeImmunohistochemistryBase SequenceMice, Inbred C57BLAmino Acid SequenceEmbryo, NonmammalianMutationGene ExpressionDNA-Binding ProteinsTime FactorsZebrafishEmbryo LossChick EmbryoZebrafish ProteinsOocytesZygoteMorphogenesisBody PatterningSignal TransductionGenes, LethalGene TargetingOrganogenesisNervous SystemEmbryo Culture TechniquesDevelopmental BiologyXenopus ProteinsEmbryonic Stem CellsGastrulaFertilizationFertilization in VitroDrosophila ProteinsOvumDrosophilaOogenesisDNA, ComplementaryStem CellsSequence Homology, Amino AcidXenopus laevisEctodermBlastulaWnt ProteinsMorulaHedgehog ProteinsEmbryo ImplantationGastrulationSomitesCloning, MolecularCells, CulturedReverse Transcriptase Polymerase Chain ReactionMice, Mutant StrainsEndodermAnimals, Genetically ModifiedNeural TubeNeural CrestDrosophila melanogasterParthenogenesisGenes, HomeoboxCell MovementCentral Nervous SystemCell LineageEmbryologyModels, BiologicalGene Expression ProfilingGerm LayersLarvaTranscription, GeneticXenopusBone Morphogenetic ProteinsExtremitiesDNA PrimersSpermatozoaOrgan SpecificityTrans-ActivatorsBlastomeresRepressor ProteinsPlacentaGestational AgeHeartEyeNuclear Proteins