Computer image analysis (1) The expression of VEGF in placenta syncytiotrophoblast cells: There was no significant difference between mild PIH group and NP group, P > 0.05;

胎盘滋养细胞VEGF染色光度：轻度妊高征组和正常晚期妊娠组比较无显著差异，尸>0.05； 中度妊高征组和轻度妊高征组比较无显著差异，尸>0.05；

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There was a higher incidence of poor perinatal outcomes in severe and moderate PIH than in mild cases(P< 0. 01).

围产儿预后不良发生率，中、重度妊高征明显高于轻度妊高征（P＜0．01）。

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The group of severe preeclampsia SRA PI, RI and S/D values than the control group and the mild and moderate PIH group were significantly higher, the difference was significant(P<0.01).

⑶重度子痫前期组SRAPI、RI和S/D值较对照组及轻度妊高征组、轻度子痫前期组均明显升高，具有显著性差异（P〈0.01）。

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The group of severe preeclampsia SRA PI, RI and S/D values than the control group and the mild and moderate PIH group were significantly higher, the difference was significant(P<0.01).

⑶重度子痫前期组SRAPI、RI和S/D值较对照组及轻度妊高征组、轻度子痫前期组均明显升高，具有显著性差异（P〈0.01）。

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