Gonadotrophin release in ovariectomized ewes fed different amounts of coumestrol.

摘要: Three experiments were conducted to study changes in pulsatile secretion of LH and FSH during the breeding season or anoestrus ovariectomized Ile-de-France ewes fed different amounts phyto-oestrogen coumestrol. In Exp. 1, season, (3-4 per group) lucerne supplying 4, 18 30 mg coumestrol ewe day for 15 days. Experiments 2 3 seasonal anoestrus. 2, (4 concentrations ranging from 4 38 mg/ewe/day 3, (10 14 125 coumestrol/ewe/day During an increased concentration diet significantly decreased amplitude pulses. There no effects on pulse frequency concentrations. anoestrus, there significant frequency, effect concentration. These results show that high diets would not explain variation ewes. However, with can influence release season.