Forty-five women with PIH were categorized into three groups according to the degree of lesions: no lesion (n=6),mild (n=13) and severe (n=26).

• 按脐带血管病变的有无及轻重程度将妊高征组分为无病变(6例)、轻度病变(13例)及重度病变(26例)3类；