BlastocystBlastomeresEmbryonic DevelopmentCleavage Stage, OvumZygoteEmbryo, MammalianEmbryo Culture TechniquesFertilization in VitroOocytesEmbryo, NonmammalianGene Expression Regulation, DevelopmentalPregnancyEmbryonic and Fetal DevelopmentMorulaEmbryo ImplantationChick EmbryoGastrulaEmbryo TransferCryopreservationEctogenesisNuclear Transfer TechniquesBlastulaCulture TechniquesCloning, OrganismUrochordataXenopus ProteinsMesodermSea UrchinsBlastocyst Inner Cell MassIn Situ HybridizationEmbryonic InductionBody PatterningEctodermParthenogenesisXenopus laevisZebrafishMorphogenesisEndodermSperm Injections, IntracytoplasmicMicroinjectionsFertilizationMolecular Sequence DataCell DifferentiationRNA, MessengerOvumMice, Inbred ICRXenopusSuperovulationCoffeaHomeodomain ProteinsCell LineageEmbryo LossFallopian TubesPreimplantation DiagnosisTranscription FactorsMice, Inbred StrainsPolar BodiesVitrificationBase SequenceCattleMice, Inbred CBATime FactorsCell NucleusPregnancy RateZebrafish ProteinsAnimals, Genetically ModifiedFetal ProteinsNervous SystemCulture MediaMice, Inbred C57BLAmino Acid SequenceGerm CellsFetal ViabilityCell CountNotochordGene ExpressionSpermatozoaDNA, ComplementaryCarbocyaninesCaenorhabditis elegansTranscription, GeneticOctamer Transcription Factor-3Embryonic Stem CellsOogenesisEmbryo DispositionDNA-Binding ProteinsQuintupletsReverse Transcriptase Polymerase Chain ReactionCell DivisionMicroscopy, FluorescenceAneuploidySignal TransductionZona PellucidaPrecursor Cells, B-LymphoidMicroscopy, ConfocalCloning, MolecularSequence Homology, Amino AcidDrosophila ProteinsCumulus CellsDNA Primers