The cell number of blastocysts obtained from in vito/in vitro were counted. Results The ratio of blastocyst formation was improved in KSOM and CZB by addition of fetal bovine serum(14.71% vs 85.71%,6.45% vs 10.81%).

• 结果 在KSOM和CZB中添加胎牛血清能显著提高胚胎囊胚发育率 (14 71%25对 85 71%25 ;6 4 5%25对10 81%25 ) ;