...docin.com豆丁网 riogenology》Vol.70(2008)：1337- 1345 张德福校杨永卿复校 摘 要：猪人工授精技术(Artificial insemination，AI)已在集约化养猪生产国中得到了广泛应用。
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由于缺乏动物识别、记录和评价计划，因而人工授精技术通常用于与进口种质资源的杂交，而并非当地的优良遗传资源。
AI is usually used for crossbreeding with imported germplasm rather than for superior local genetics, due to the paucity of animal identification, recording and evaluation programmes.
调查结果表明，主要的影响因素有：人工授精技术、推广经费问题、饲料与饲养管理技术、肉牛销售与市场、肉牛屠宰加工技术等等。
The results showed that main factors were artificial breeding skill, cost, ration and feeding skill, labor difficulty, live beef market, butcher skill, etc.
比如人工授精和体外受精，近来的生育技术进步使女性的总收入相对于男性增加了。
Recent technological advances in reproduction, such as artificial insemination and in vitro fertilization, have increased the full income of women relative to men.
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