BlastocystEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEmbryonic DevelopmentEmbryo ImplantationEmbryonic and Fetal DevelopmentCleavage Stage, OvumGene Expression Regulation, DevelopmentalPregnancyBlastomeresEmbryo LossFertilization in VitroMorulaEmbryo Implantation, DelayedMolecular Sequence DataZygoteIn Situ HybridizationGastrulaBase SequenceBody PatterningCryopreservationTime FactorsCulture TechniquesAmino Acid SequenceEndodermMesodermEctogenesisMorphogenesisOocytesEctodermCochlear ImplantationRNA, MessengerUterusZebrafishEmbryo DispositionMice, Inbred ICRPregnancy RateHomeodomain ProteinsMice, Inbred StrainsCloning, OrganismFetal ViabilityLens Implantation, IntraocularTranscription FactorsMutationDNA CleavageCell DifferentiationTrophoblastsNuclear Transfer TechniquesSperm Injections, IntracytoplasmicEmbryo TransferSingle Embryo TransferMice, Inbred C57BLParthenogenesisEndometriumEmbryo Culture TechniquesSignal TransductionChimeraEmbryo ResearchZebrafish ProteinsDNA-Binding ProteinsFertilizationYolk SacSomitesEmbryonic InductionCell LineTreatment OutcomeImmunohistochemistryPhenotypeGerm LayersPacemaker, ArtificialDNAMicroinjectionsGene ExpressionXenopus ProteinsCloning, MolecularCell LineageMice, Inbred CBAMice, TransgenicMice, KnockoutSuperovulationNervous SystemStentsCell NucleusGestational AgeMice, Mutant StrainsCell DivisionDeciduaProsthesis DesignCulture MediaFallopian TubesDrosophila ProteinsTranscription, GeneticNodal ProteinDrosophilaNeural CrestApoptosisGenes, LethalCattleReverse Transcriptase Polymerase Chain Reaction