Jakubicka I, Barta M, Nitray J, Szeleszczuková O
Vet Med (Praha). 1989 Apr;34(4):251-6.
The fluctuations in the concentrations of progesterone in peripheral blood of three intact coypus and three coypus after natural mating were investigated for the period of four months. Immediately after mating the concentrations of progesterone are low (1.5-2.4 ng.ml-1), the maximum values reach the peak between the 14th and 15th week of gravidity (12.50-20.72 ng.ml-1), whilst there is almost no change in the intact females. On the last days of gravidity the values of progesterone decrease rapidly and they are very low on the day of parturition (1.0-2.5 ng.ml-1). The concentration of progesterone in the blood plasma of intact females in the test period is low (0.09-3.18 ng.ml-1).
对三只未交配的海狸鼠和三只自然交配后的海狸鼠外周血中孕酮浓度进行了为期四个月的调查。交配后立即，孕酮浓度较低（1.5 - 2.4 ng.ml-1），最大值在妊娠第14至15周达到峰值（12.50 - 20.72 ng.ml-1），而未交配的雌性几乎没有变化。在妊娠的最后几天，孕酮值迅速下降，分娩当天非常低（1.0 - 2.5 ng.ml-1）。测试期间未交配雌性血浆中孕酮浓度较低（0.09 - 3.18 ng.ml-1）。
