下列哪项符合正常产褥期子宫复旧的规律（）
A.产后30天，子宫体恢复正常大小
B.产后4周时子宫颈完全恢复正常形态
C.产后4天时宫颈内口关闭
D.产后1周，子宫于腹部不可扪及
E.产后子宫底每天下降3cm
参考答案：B
解析：产后6周，子宫体恢复正常大小，产后1周时宫颈外形及子宫颈口恢复至未孕状态，产后10天，子宫底于腹部不可扪及，产后子宫底每天下降1～2cm
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