Whyman D, Johnson D L, Knight T W, Moore R W
J Reprod Fertil. 1979 Mar;55(2):481-8. doi: 10.1530/jrf.0.0550481.
The timing of ovulations in 42 PMSG-treated ewes was determined by repeated endoscopy. The first ovulation occurred at a median time of 23 . 6 +/- 0 . 5 (s.e.m.) h after the onset of oestrus. The median interval between first and second ovulations was less than 1 h, and that between first and last ovulations was approximately 6 h. In 59 untreated ewes, probit regression analysis was applied to the number of ovulations which were found by endoscopy to have occurred by 23, 25 and 27 h after the onset of oestrus. The median time of first ovulation was 25 . 5 +/- 0 . 5 h after the onset of oestrus, this interval being similar in single- and twin-ovulating ewes. The median interval between twin ovulations was 1 . 2 +/- 0 . 6 h. Ovulation occurred after the end of oestrus in at least 75% of ewes.
通过反复内窥镜检查确定了42只接受孕马血清促性腺激素（PMSG）处理的母羊的排卵时间。首次排卵发生在发情开始后23.6±0.5（标准误）小时的中位数时间。第一次和第二次排卵之间的中位数间隔小于1小时，第一次和最后一次排卵之间的间隔约为6小时。对59只未处理的母羊，应用概率回归分析发情开始后23、25和27小时通过内窥镜检查发现的排卵数量。首次排卵的中位数时间为发情开始后25.5±0.5小时，单排卵和双排卵母羊的这一间隔相似。双排卵之间的中位数间隔为1.2±0.6小时。至少75%的母羊在发情结束后排卵。
