Cloning, OrganismSwineNuclear Transfer TechniquesSus scrofaClone CellsEmbryo, MammalianBlastocystMorulaGuinea PigsEmbryonic and Fetal DevelopmentTissue DonorsFertilization in VitroEmbryo, NonmammalianChick EmbryoPregnancyOocytesEmbryo TransferCytopathogenic Effect, ViralCloning, MolecularBlood DonorsMolecular Sequence DataBase SequenceAnesthesiologyEmbryo ImplantationCells, CulturedEmbryonic DevelopmentAmino Acid SequenceGene Expression Regulation, DevelopmentalTransplantation, Homologous