奶牛产后卵巢活动和卵巢囊肿的研究

THE OVARIAN ACTIVITY AND OVARIAN CYSTS IN POST-PARTUM DAIRY COWS

采用放射免疫分析法测定血浆孕酮含量和直肠检查结合的方法,研究了28头奶牛产后卵巢活动情况和卵巢囊肿的发生频率。结果表明,除1头奶牛卵巢静止外,27头在分娩后23.63 ±7.74天(13～46天)卵巢开始活动(卵泡发育),其中8头牛(占29.63％)有发情表现;第2～5次卵巢活动的时间分别为:分娩后45.67±8.92天,66.54±8.85天,88.37±11.71天和109.00±8.32天;分娩后60天内仅有60.71％的牛第一次发情;卵巢囊肿的发生频率为39.29％,其中卵泡囊肿8.93％,黄体囊肿16.07％,囊肿黄体14.29％。

Ovarian activity and the frequency of oyarian cysts in 28 post-partum dairy cows were studied using RIA to measure plasma progesterone concentrations in combination with rectal palpation. The results showed that ovarian cyclic activity in 27 dairy cows started 23.63 ± 7.74 days after partum, ex-'ccpt for one cow that did not resume cyclic ovarian activity, of which only 8 cows (28.57%) had estrous sign during the first ovarian activity whose''2 - 5th ovarian cyclic activity occured on 45.67±8.92 , 66.54±8.85 ; 88.37 ±11.71 and 109.00±18.32 days after parturition respectively. There were only 60.71% of 28 cows had their first estrus within 60 days after partum. The frequency of ayarian cysts was 39.29%,including follicular cysts (8.93); luteal cysts (16.07%) and cystic corpora lutea (14.29%) .