Boyd H, Munro C D
Vet Rec. 1979 Apr 14;104(15):341-3. doi: 10.1136/vr.104.15.341.
Fifty-one dairy cows were examined three times at weekly intervals during weeks 5 to 7 after calving. Rectal palpation of the ovaries and plasma progesterone assay were used to determine cyclic ovarian function. Eight of 51 cows exhibited true anoestrus by day 49 after calving. Only 23 of 43 cycling cows were served by day 77, the end of the target period for first service. In 77 per cent of 142 examinations, rectal palpation and progesterone assay gave compatible results. Most incompatibility occurred early or late inthe cycle, or in association with cystic structures in the ovaries. Eleven of the 51 cows had cysts in the ovaries but cyclicity and fertility were not adversely affected.
在产犊后的第5至7周期间，对51头奶牛每隔一周进行了三次检查。通过直肠触诊卵巢和检测血浆孕酮来确定卵巢的周期性功能。51头奶牛中有8头在产犊后第49天表现出真正的乏情。在第77天（首次配种的目标期限结束时），43头有发情周期的奶牛中只有23头接受了配种。在142次检查中，77%的直肠触诊和孕酮检测结果相符。大多数不相符情况发生在周期的早期或晚期，或者与卵巢中的囊肿结构有关。51头奶牛中有11头卵巢有囊肿，但发情周期和繁殖力未受到不利影响。
