Methods: The expression of HB-EGF and EGFR was observed in 30 unknown reason infertility and 20 normal female with immunohistochemical method.

• 方法：选择不明原因性不孕症患者30例，正常生育妇女20例，采用免疫组织化学法分析子宫内膜HB-EGF及其受体的表达。