Cloning, OrganismSwineSheepNuclear Transfer TechniquesSus scrofaClone CellsEmbryo, MammalianBlastocystMorulaGuinea PigsEmbryonic and Fetal DevelopmentSheep DiseasesCloning, MolecularEmbryo, NonmammalianFertilization in VitroMolecular Sequence DataChick EmbryoPregnancyBase SequenceCytopathogenic Effect, ViralSheep, DomesticAmino Acid SequenceOocytesEmbryo TransferEmbryo ImplantationScienceCells, CulturedEmbryonic DevelopmentSequence Homology, Amino AcidDNA, ComplementaryResearch PersonnelGene Expression Regulation, DevelopmentalRNA, Messenger