Herriman I D, Harwood D J, Mallinson C B, Heitzman R J
J Endocrinol. 1979 Apr;81(1):61-4. doi: 10.1677/joe.0.0810061.
Measurements were made of the plasma concentrations of testosterone, progesterone and oestradiol-17 beta during the oestrous cycle of the ewe, and of the plasma concentrations of testosterone and progesterone during the oestrous cycle of the heifer. The maximum concentration of progesterone in the heifer was nearly twice that in the ewe. The maximum concentration of testosterone was similar in both species and occurred at the onset of luteolysis; in the ewe the peak concentration of 19.5 ng/ml plasma was significantly greater (P less than 0.05) than the concentrations of testosterone measured during the remainder of the oestrous cycle.
对母羊发情周期中睾酮、孕酮和雌二醇 - 17β 的血浆浓度进行了测量，同时也测量了小母牛发情周期中睾酮和孕酮的血浆浓度。小母牛孕酮的最大浓度几乎是母羊的两倍。两种动物睾酮的最大浓度相似，且都出现在黄体溶解开始时；母羊血浆中睾酮的峰值浓度为 19.5 ng/ml，显著高于发情周期其余阶段测得的睾酮浓度（P < 0.05）。
