donors (Japanese black cattle) were superovulated with four treatments. The results showed that two treatments(FSH 20AU + PGFZa 25mg and FSH 20AU + PGF2a Estrumate 0 .7mg) got more transferable embryos.

• 采用四种超数排卵处理方法对19头日本肉用黑毛和牛进行了超数排卵试验，结果以FSH 20AU＋PGF2A25mg和FSH 20AU＋PGF2a类似物制剂（Estrumate）0.；75mg两个处理所获的可用胚数量较多。