枕右前位分娩机制正确的是 ( )A.胎头矢状缝衔接在骨盆入口右斜径上B.胎头枕部遇肛提肌阻力发生俯屈C.胎头下降达到阴道口时出现内旋转动作D....

作者: rantiku 人气: - 评论: 0
问题 枕右前位分娩机制正确的是 ( )
选项 A.胎头矢状缝衔接在骨盆入口右斜径上 B.胎头枕部遇肛提肌阻力发生俯屈 C.胎头下降达到阴道口时出现内旋转动作 D.胎头内旋转时,其枕部向右旋转90° E.胎头娩出后,枕部向左旋转90°复位
答案 B
解析

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