Nett T M, Holtan D W, Estergreen V L
J Reprod Fertil Suppl. 1975 Oct(23):201-6.
The levels of LH, prolactin and oestrogen were measured by radioimmunoassay in serum obtained from six mares during the post-partum period, and LH was also assayed in blood samples collected at 6-hr intervals from four normal cyclic mares during oestrus and at daily intervals during dioestrus. The concentrations of oestrogen and LH suggested that the mares were having ovulatory cycles during the post-partum period irrespective of behavioural oestrus, and the levels of prolactin seemed to rise in association with probable ovulatory LH peaks. In these mares levels of LH had increased significantly (P less than 0-05) by Day 4 of oestrus and reached a peak (140 +/- 48 ng/ml) about 1 day before the end of oestrus. They then declined rapidly and remained at basal levels (10 to 20 ng/ml) during dioestrus.
采用放射免疫分析法测定了6匹母马产后血清中促黄体生成素（LH）、催乳素和雌激素的水平，同时还对4匹正常发情周期母马在发情期每隔6小时以及在间情期每天采集的血样进行了LH检测。雌激素和LH的浓度表明，母马在产后期间存在排卵周期，与行为性发情无关，催乳素水平似乎随着可能的排卵LH峰值而升高。在这些母马中，LH水平在发情第4天显著升高（P<0.05），并在发情结束前约1天达到峰值（140±48 ng/ml）。然后迅速下降，并在间情期维持在基础水平（10至20 ng/ml）。
