Methods Forty nine cases of pregnant women over 37 weeks were divided into normal and abnormal groups according to fetal BpD,AC,HC,FL which were measured with Doppler Ultrasound.

• 方法 观察对象为 4 9例孕37周以上的孕妇 ,用超声多普勒检测仪检测胎儿双顶径、腹围、头围、股骨长径估测体重 ,结合脐动脉血流动力学指数 :S/ D比值、PI、RI,按围产儿结局分为正常组和不良组进行对比性研究。