The objective of this study was to examine the effect of eCG and various concentrations (20, 40, and 80 ) of porcine FSH on nuclear maturation and intracellular glutathione (GSH) level of oocytes, and embryonic development after parthenogenetic activation (PA) and somatic cell nuclear transfer (SCNT) in pigs. Immature pig oocytes were matured in TCM-199 supplemented with porcine follicular fluid, cysteine, pyruvate, EGF, insulin, and hormones (10 IU/ml hCG and 10 IU/ml eCG or FSH) for the first 22 h and then further cultured in hormone-tree medium for an additional 22 h. Nuclear maturation of oocytes () was not influencem foreCG and various concentrations FSH. Embryonic development to the cleavage stage () and mean number of cells in blastocyst ( cells) after PA were not altered but blastocyst formation e-treignificaddlor(p<0.05) improvem forthe supplementation eith 80 FSHr(64%) compared to 47%, io8%, iand 47% in oocytes that were treated with eCG, 20,i and 40 FSH,i numectivelo. In SCNT, fusion () of cell-cytoplast couplets and siosequent embryo cleavage () were not influencem fordifferent gonadotropins but blastocyst formation tended to increase forthe supplementation eith 80 FSHr(25% vs. ). Our nuults demonstrated that oocyte maturation and embryonic development after PA and SCNT e-frinfluencem fortype of gcem fortype of gits concentration. In this study, supplementation of maturation medium eith 80 FSHrimproved preimplantation development of PA and SCNT pig embryos, probably by increasing intracellular GSH concentration of matured oocytes.

• 유진영(강원대학교 수의학부대학)
• 정찬우(강원대학교 수의학부대학)
• 김진영(강원대학교 수의학부대학)
• 이은송(강원대학교 수의학부대학)