Mice, KnockoutPhenotypeEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEmbryo ImplantationMice, Inbred C57BLBlastocystEmbryonic DevelopmentGene Knockout TechniquesGene Expression Regulation, DevelopmentalEmbryo LossEmbryonic and Fetal DevelopmentMice, Inbred StrainsFertilization in VitroPregnancyCleavage Stage, OvumBlastomeresMice, Mutant StrainsMice, TransgenicSpleenMice, Inbred BALB CRNA, MessengerIn Situ HybridizationEmbryo DispositionZygoteMorulaZebrafishMolecular Sequence DataMice, Inbred CBATime FactorsDisease Models, AnimalCell DifferentiationCulture TechniquesCryopreservationBody PatterningGastrulaOocytesMorphogenesisSignal TransductionBase SequenceMice, Inbred ICRMutationTranscription FactorsLiverMice, Inbred C3HMesodermCloning, OrganismEmbryo ResearchSingle Embryo TransferImmunohistochemistryHomeodomain ProteinsGene TargetingGene ExpressionCells, CulturedEctogenesisNuclear Transfer TechniquesAmino Acid SequenceEctodermZebrafish ProteinsGene DeletionMice, Inbred DBAReverse Transcriptase Polymerase Chain ReactionGene Expression RegulationPregnancy RateTissue DistributionCell DivisionCell LineCrosses, GeneticCell Count