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首页> 外文期刊>Tropical Animal Health and Production >Ovarian activity, transuterine embryo migration and prenatal losses in Ethiopian highland ewes
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Ovarian activity, transuterine embryo migration and prenatal losses in Ethiopian highland ewes

机译：埃塞俄比亚高地母羊的卵巢活动，经子宫胚胎迁移和产前损失

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摘要

A study was conducted on 1442 Ethiopian highland ewes to determine the seasonality of ovarian activity, intrauterine embryo migration and prenatal reproductive wastage. Assessment of ovarian follicular activity revealed that a higher (p < 0.01) proportion of ewes ovulated in the dry season than in the heavy and light rainy seasons. However, there was a tendency (p = 0.057) of decline in the mean number of ovulations per ewes during the light rains. The mean diameter of the largest follicle on the ipsilateral ovary was higher (p < 0.01) in both ewes with single and those with twin corpora lutea (CL) than on the contralateral ovary; and, compared to ewes with single CL, it was higher (p < 0.05) in those with twin CL. The right ovary was more active (p < 0.001) only in single-ovulating ewes. Similarly, a higher (p < 0.001) proportion of ewes were pregnant in the right horn. Embryos migrated to the opposite horn in single-, twin- and triple-ovulating ewes. There was a higher (p < 0.001) tendency for the left-to-right migration than the opposite. There was significant (p < 0.01) association between embryo loss and site and number of ovulations. Embryo loss was higher (p < 0.01) in ewes with twin ovulations on the right ovary. It is very likely that these results indicate a better chance of embryo survival in the right uterine horn.
机译：对1442埃塞俄比亚高地母羊进行了一项研究，以确定卵巢活动，子宫内胚胎迁移和产前生殖浪费的季节性。卵巢卵泡活动的评估表明，在干旱季节排卵的母羊比例要比在雨季和雨季少（p <0.01）。但是，在小雨期间，每头母羊的平均排卵数有下降的趋势（p = 0.057）。单体和双体黄体（CL）母羊同侧卵巢最大卵泡的平均直径均高于对侧卵巢（p <0.01）。与单CL的母羊相比，双CL的母羊更高（p <0.05）。仅在单排卵母羊中，右卵巢较活跃（p <0.001）。同样，在右角怀孕的母羊比例较高（p <0.001）。胚胎在单排卵，双排卵和三排卵母羊中迁移到相反的角。从左向右迁移的趋势比反向迁移更高（p <0.001）。胚胎损失与排卵部位和排卵次数之间存在显着（p <0.01）关联。在右侧卵巢上有双排卵的母羊，胚胎损失较高（p <0.01）。这些结果很可能表明在右子宫角中有更好的胚胎存活机会。

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