关键词: 重复超排; FSH剂量调整; 波尔山羊; 胚胎移植

Abstract: In the present study，the superovulation records of 218 2 to 5 year-old multiparous boer goats were analyzed，and the repeated superovulation schemes were designed according to superovulatory response and the number of recovered embryos. All of donor does were divided into five groups，according to records of first superovulation response，for repeated superovulation in decreasing FSH dosage at 60 days intervals. Group 1 only had follicle but no ovulation; group 2 was not in estrus after superovulatory treatment; group 3 had the number of corpus luteum≤4; group 4 had the number of corpus luteum 5 to 14，and group 5 had the number of luteal number≥15. The results showed that the effective utilization rate of donor of five groups were 100%，75.00%，71.88%，93.10% and 93.65% respectively，there was no significant difference（P＞0.05）; the number of all embryos of five groups were 14.00±5.73，12.10±6.78，11.77±7.26，13.84±7.04 and 18.03±9.06 respectively, group 5 was very significant higher than other groups(P＜0.01); the number of recovered embryos of five groups were 12.81±6.04，10.33±8.12，10.08±7.14，11.34±6.58 and 15.37±7.64 respectively, group 5 was significant higher than 2,3 and 4 groups(P＜0.05), but there was no significant difference with group 1(P>0.05) . In conclusion， it was feasible to adjust the does of FSH for repeated superovulation according to the effect of first superovulation. Repeated superovulation treatment by increasing FSH dosage could make good response for the poor or no response of the first superovulatory treatment and there were more than 70% of the effective donor to be used.

Key words: repeated superovulation; FSH dosage adjustment; Boer goat; embryo transfer