(来学网)胎膜自然破裂大部分发生在
  • A.
    (来学网)临产后宫口开大5~7cm
  • B.
    (来学网)临产后宫口开大4~5cm
  • C.
    (来学网)临产后宫口开大2~3cm
  • D.
    (来学网)临产后宫口近全开
  • E.
    (来学网)临产后宫口开全