2011-01-24 14:55:16

2011-01-24 14:54:43

2011-01-24 14:54:28

人们普遍认为，怀孕中晚期同房，会加速女性分娩速度，但过去一直缺乏相关理论支持。

2011-01-24 14:54:00

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