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【单选题】
子宫内膜异位症患者不孕的原因可能是A.
卵巢内膜异位囊肿形成，影响卵子发育及排出
B.
输卵管粘连，蠕动功能下降甚至输卵管不通
C.
盆腔炎性因子如前列腺素等分泌增加，子宫内膜容受性下降
D.
以上均有可能
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