Methods To observe and analyze fetal each planes of echogram and fetal umbilical blood velocity parameter by two dimensional ultrasound and CDFI.

• 方法利用二维超声(2D)和彩色多普勒血流图(CDFI),仔细观察分析胎儿各超声切面图像及分析胎儿脐动脉血流流速曲线参数。