BlastocystEmbryo, MammalianPreimplantation DiagnosisEmbryonic DevelopmentEmbryonic and Fetal DevelopmentEmbryo Culture TechniquesZygoteBlastomeresMorulaEmbryo ImplantationCleavage Stage, OvumGene Expression Regulation, DevelopmentalPregnancyEmbryo, NonmammalianFertilization in VitroOocytesChick EmbryoMammalsCulture TechniquesEctogenesisBlastocyst Inner Cell MassEctodermTotipotent Stem CellsMice, Inbred CBAMolecular Sequence DataTrophoblastsMice, Inbred ICRGenomic ImprintingEndodermBody PatterningOctamer Transcription Factor-3