Abstract: farrowing is one of the most important part in the pig industry, the duration of farrowing influences the number of live birth as well as piglets survival rate.

摘要：母猪分娩是养猪生产中非常重要的环节之一，产程不仅影响窝产活仔数，而且还影响仔猪出生后成活率。

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Abstract: farrowing is one of the most important part in the pig industry, the duration of farrowing influences the number of live birth as well as piglets survival rate.

摘要母猪分娩是养猪生产中非常重要的环节之一，产程不仅影响窝产活仔数，而且还影响仔猪出生后成活率。

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