Adbel-Rahim S E, Lowman B G, Deas D W
Vet Rec. 1980 Jan 12;106(2):28-30. doi: 10.1136/vr.106.2.28.
The potential value of milk progesterone profiles in conjunction with rectal examination in the diagnosis of subfertility in beef suckler cows was investigated. Ten of 20 cows suckled their calves three times per day and the other 10 suckled their calves continuously. Milk samples were collected twice weekly during the 21 days prior to first service and up to day 50 post mating in cows confirmed pregnant. The uterine and ovarian states of the cows were examined per rectum weekly between calving and first service. Progesterone profiles of cows conceiving to first service showed a typical smooth curve, while those of cows failing to conceive were irregular and indicated disturbances in the normal functioning of the corpus luteum.
研究了牛奶孕酮水平结合直肠检查在诊断肉用哺乳母牛不育症方面的潜在价值。20头母牛中有10头每天给小牛哺乳3次，另外10头持续给小牛哺乳。在首次配种前21天直至确认怀孕的母牛配种后第50天，每周采集两次牛奶样本。在产犊至首次配种期间，每周通过直肠检查母牛的子宫和卵巢状态。首次配种受孕母牛的孕酮水平呈现典型的平滑曲线，而未受孕母牛的孕酮水平则不规则，表明黄体正常功能受到干扰。
