The difference of pregnancy rate of embryo transfer between receptor and donor does of synchronized estrus,12h late,24h late were not so significiant and affection of the second or the first operation was not so big to receptor doe.

• 受体羊与供体羊的发情时间同步、晚12h、晚24h,胚胎移植受胎率差异不大,受体羊第二次手术与第一次手术移植对产羔率影响不大。