Kesler D J, Garverick H A, Bierschwal C J, Elmore R G, Youngquist R S
J Dairy Sci. 1979 Aug;62(8):1290-6. doi: 10.3168/jds.S0022-0302(79)83414-1.
Concentrations of reproductive hormones and ovarian changes were monitored every 4 days during the postpartum period in 35 dairy cows. The cows were classified as either control (22 cows) or cystic (13 cows) based on per rectum examination of the ovaries. Control cows were detected with a corpus luteum after the first postpartum ovulation while in cystic cows, ovarian follicles of at least 2.5 cm in diameter persisted in the absence of a corpus luteum for at least 14 days. The mean postpartum interval to the first follicle 1.5 to 2.0 cm in diameter was about 16 days for both groups. Ovulation was detected earlier postpartum for cows in the control group (18.4 +/- 1.7 days) than for cows in the cystic group (36.3 +/- 2.7 days). Luteinizing hormone in plasma increased during the early postpartum period (days 1 to 10) for both groups, but mean concentrations of luteinizing hormone, progesterone, and estradiol-17 beta in plasma were not different between groups then or on days -8, -4, or 0 (day of the first postpartum follicle 1.5 to 2.0 cm in diameter). During this period (days -8 to 0), estradiol-17 beta and luteinizing hormone in plasma were correlated positively, but regression coefficients differed between groups. These results suggest a partial hypothalamic and/or pituitary failure in releasing pituitary luteinizing hormone as a cause for postpartum ovarian cysts.
在35头奶牛的产后期间，每4天监测一次生殖激素浓度和卵巢变化。根据直肠检查卵巢情况，将奶牛分为对照组（22头）和囊肿组（13头）。对照组奶牛在首次产后排卵后检测到黄体，而囊肿组奶牛在无黄体的情况下，直径至少2.5厘米的卵巢卵泡持续存在至少14天。两组直径1.5至2.0厘米的首个卵泡的平均产后间隔约为16天。对照组奶牛产后排卵时间（18.4±1.7天）早于囊肿组奶牛（36.3±2.7天）。两组血浆促黄体生成素在产后早期（第1至10天）均升高，但当时及-8、-4或0天（首个直径1.5至2.0厘米的产后卵泡日）时，两组血浆促黄体生成素、孕酮和雌二醇-17β的平均浓度无差异。在此期间（-8至0天），血浆雌二醇-17β与促黄体生成素呈正相关，但两组回归系数不同。这些结果表明，产后卵巢囊肿的原因是下丘脑和/或垂体在释放垂体促黄体生成素方面存在部分功能衰竭。
