Reproductive Hormone Secretion of Daiyun and Fuqing Goats in Oestrus

The secretion of reproductive hormonesin Daiyun and Fuqing goats inoestrus was studied. The secretory characteristics, such as FSH, LH, E₂ and P hormone levels, during the estrousperiod were monitored using ELISA. Serum FSH and LH of the two breeds of goats fluctuated cyclically 4 peaks in Fuqing goats, and 5 peaks in Daiyun. There were one high and one low E₂ secretion phases with an extremely significant difference on the hormonal concentration in serum(P < 0.01).During the hypersecretion phase, E₂ in Daiyun was significantly higher than that in Fuqing goats (P < 0.05).For both breeds, their Phormones lowered during oestrus as well as 2-3 days before and after oestrus. The level increased rapidly on the 6^thday of the estrous cycle; reached a peak on 8^th to 9^th day, and was extremely significantly greater than the average during the oestrus (P < 0.01). Thereafter until the 16^th day, the secretions fluctuated in a continual high range, and eventually, decreased swiftly to alow level.