Embryo, MammalianClone CellsEmbryo, NonmammalianBlastocystChick EmbryoEmbryo ImplantationEmbryonic DevelopmentCleavage Stage, OvumBlastomeresEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalFertilization in VitroZygoteMorulaGastrulaPregnancyEmbryo Culture TechniquesOocytesCryopreservationMolecular Sequence DataEmbryo LossIn Situ HybridizationBase SequenceMesodermEctogenesisZebrafishCulture TechniquesXenopus ProteinsBody PatterningMorphogenesisAmino Acid SequenceRNA, MessengerNuclear Transfer TechniquesEctodermCloning, MolecularCloning, OrganismSea UrchinsXenopus laevisEndodermBlastocyst Inner Cell MassBlastulaEmbryonic InductionEmbryo TransferEmbryo DispositionPreimplantation DiagnosisSperm Injections, IntracytoplasmicHomeodomain ProteinsTranscription FactorsMicroinjectionsPregnancy RateDNA, ComplementaryVitrificationXenopusTime FactorsZebrafish ProteinsCell DifferentiationParthenogenesisCoffeaAnimals, Genetically ModifiedFertilizationOvumNervous SystemMice, Inbred ICRGene ExpressionSuperovulationEmbryo ResearchMutationSingle Embryo TransferPolar BodiesSequence Homology, Amino AcidDrosophila ProteinsMice, Inbred StrainsTranscription, GeneticCell LineageCattleFallopian TubesCulture MediaMice, Inbred C57BLDNA-Binding ProteinsSeedsSignal TransductionCell NucleusReverse Transcriptase Polymerase Chain ReactionGerm CellsMice, Inbred CBAImmunohistochemistryPhenotypeEmbryonic Stem CellsDNA PrimersGenes, HomeoboxDrosophilaPolymerase Chain ReactionOogenesisCell DivisionDNABlastodermFetal ViabilitySpermatozoaQuintupletsAneuploidy