MorulaBlastocystEmbryonic DevelopmentEmbryonic and Fetal DevelopmentCleavage Stage, OvumEmbryo, MammalianZygoteCloning, OrganismBlastomeresOocytesFertilization in VitroFetal ViabilityParthenogenesisEmbryo TransferFallopian TubesPregnancyNuclear Transfer TechniquesCulture TechniquesGene Expression Regulation, DevelopmentalCattleCulture MediaMice, Inbred StrainsEmbryo Culture TechniquesVitrificationCells, CulturedTime FactorsRNA, MessengerEmbryo ImplantationCryopreservation