1.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脉
数(PI),阻力
数(RI),预测妊
征的发生、发展及预
。