Objective To observe pulsative index (PI), resistant index (RI) of placental helicine arteries by colour Doppler, analyses relation between PI, RI and developing of pregnant hypertension.

• 目的本研究采用彩色多普勒检测孕妇子宫胎盘床螺旋动脉搏动指数(PI),阻力指数(RI),预测妊高征的发生、发展及预后。方法选择无慢性高血压,心、肝、肾合并症正常孕妇184例。