METHOD: Immunohistochemistry SP method was used to detect expression of KDR and MVD value in placentas in 22 cases of severe, 20 cases of light pre-eclampsia and 20 cases of normal pregnancies.

• 方法:采用免疫组化SP法检测KDR在子痫前期重度组22例、轻度组20例和正常对照组20例胎盘中的表达情况,记数胎盘间质的MVD值。