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卵巢囊肿是引起乳牛不育的重要原因,大的卵巢囊肿无黄体、周期不规律或无周期。牛卵巢囊肿通常分为卵泡性或黄素性囊肿。一般认为下丘脑-垂体-性腺轴系统内分泌不平衡导致卵巢囊肿,但确切原因尚不清楚。有人提出促卵泡成熟素(FSH)过多或黄体生成素(LH)的效能低于正常可能是形成卵巢囊肿的因素。1982年Kesler提出卵巢囊肿的生长是由于下丘脑或垂体对雌二醇(E(?))的反应性降低所致,尽管提出了这些理论,仍无结论性证据。本实验目的:①观察乳牛的规律周期(控制)和慢性卵巢囊肿卵巢切除前和切除后不同时
Ovarian cyst is an important cause of infertility in cows, large ovarian cysts without corpus luteum, irregular or periodic cycle. Bovine ovarian cysts are usually divided into follicular or luteinized cysts. It is generally believed that the hypothalamus - pituitary - gonadal axis system leading to ovarian cyst imbalance, but the exact cause is not clear. It has been suggested that follicle-stimulating hormone (FSH) excess or luteinizing hormone (LH) less than normal may be the formation of ovarian cysts. In 1982, Kesler proposed that the growth of ovarian cysts is due to the decreased reactivity of the hypothalamus or pituitary to estradiol (E (?)). Despite these theories, there is no conclusive evidence. The purpose of this experiment: ① observe the regular cycle of cows (control) and ovarian cysts before ovariectomy and after resection are not