题目内容

临产后子宫收缩的特点,下列哪项是正确的

A. 宫缩时,子宫体部肌纤维缩短变宽,间歇时完全恢复原来长度
B. 从子宫两角处发动节律性收缩,向子宫底中部集中,再向下扩展
C. 子宫底部收缩力强,子宫下段收缩力最弱
D. 宫缩达高峰,子宫体隆起变硬

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下列哪种现象属于临产的诊断依据

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D. 阴道流水

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