Abstract: The effect factors of the superovulation in rabbit were investigated in this study. The results showed: ①The average number of oocytes recovered from FSH-treated group(30.05±8.97) was significantly higher than PMSG-treated group (22.46±5.18)(P＜0.05). ② When the superovulation was conducted in seasons of Spring,Summer,Autumn and Winter,the number of recovered oocytes were 32.34±5.58, 15.96±4.11, 24.18±4.95 and 22.61±3.75,respectively,the number of recovered oocytes of the treatment group in Spring was higher than that of the other three groups (P＜0.05),and there were no difference between Autumn and Winter groups(P＞0.05),but both of them were higher than Summer group (P＜0.05). ③ The average number of oocytes recovered from superovulation in pluriparous rabbit group(30.56±6.79) was higher than young rabbit group (21.60±3.66)(P＜0.05). These results indicated that the effect of FSH on superovulation in rabbit was more effective than PMSG,and the season of spring and pluriparous rabbit were comparatively suitable for superovulation.

Key words: rabbit; superovulation; FSH; PMSG; seasons