Allen W E
Vet Rec. 1979 Feb 24;104(8):166-7. doi: 10.1136/vr.104.8.166.
The situations and conditions that can disrupt the mares normal oestrous cycle are described. Season of the year is a major influence; maximum reproductive efficiency does not totally coincide with the artificially defined "breeding season". Other abnormalities are associated with spontaneously persistent luteal function, psychological influences over behavioural activity, the presence of endometritis, multiple ovulation, reproductive behavior after pregnancy failure and granulosa cell tumours.
文中描述了可能扰乱母马正常发情周期的情况和条件。一年中的季节是一个主要影响因素；最高繁殖效率与人为定义的“繁殖季节”并不完全一致。其他异常情况与自发性黄体持续功能、心理对行为活动的影响、子宫内膜炎的存在、多次排卵、妊娠失败后的生殖行为以及颗粒细胞瘤有关。
