妊娠时机体内环境发生很大改变 ,妊高征是严重危害孕妇健康的妊娠合并症 ,病因未明 ,但近来研究发现一氧化氮(ＮＯ) (又称血管内皮依赖性舒张因子 ,ＥＯＲＦ) ,与妊娠及妊高征的关系密切 ,但各家报道意见不一( 1) ,现我院最近研究结果报道如下。1 资料和方法研究对象　对照组 2 Pregnancy time the body environment has changed greatly, pregnancy-induced hypertension is a serious risk to pregnant women’s pregnancy complications, the etiology is not yet clear, but recently found that nitric oxide (NO) (also known as endothelium-dependent vasodilatation factor, EORF), and pregnancy And pregnancy-induced hypertension are closely related, but different opinions of various reports (1), the recent results of our hospital are reported below. 1 data and methods study subjects control group 2