题目内容 (请给出正确答案)
提问人:网友l******8 发布时间:2022年3月20日 23:56
[单项选择题]

青春期无排卵型功能失调性子宫出血的主要原因是()。

A.缺乏雌激素

B.凝血功能异常

C.缺乏孕激素

D.子宫内膜增生过长

E.子宫内膜发育不良

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