Cloning, OrganismEmbryo ResearchSwineSheepNuclear Transfer TechniquesSus scrofaClone CellsEmbryo, MammalianBlastocystMorulaGuinea PigsEmbryonic and Fetal DevelopmentSheep DiseasesEmbryo, NonmammalianFertilization in VitroChick EmbryoPregnancyCytopathogenic Effect, ViralSheep, DomesticCloning, MolecularOocytesMolecular Sequence DataEmbryo TransferEmbryo ImplantationBase SequenceAmino Acid SequenceCells, CulturedEmbryonic DevelopmentGene Expression Regulation, DevelopmentalEmbryo LossDNA, ComplementaryRNA, MessengerSequence Homology, Amino AcidCleavage Stage, OvumBlastomeres