The developmental rate of nuclear transfer embryos(NTE) was 65.8%, 53.1% and 33.3% respectively, when the recipient oocytes were activated two hours, one hour prior to fusion and nonactivated.

• 体外培养时 ；以融合前 1h激活、融合前 2h激活及融合前不激活的卵母细胞作核受体的重组胚 ；发育率分别为 6 5 .；8%25；5 3