Methods 70 cases pregnant women (pregnant age ranging from 13 to 40 weeks) were examined by color Doppler ultrasound to measure the umbilical artery blood flow quantities of the normal foetuses.
方法应用彩色多普勒超声检测70例孕妇（孕13～40周）的正常胎儿的脐动脉血流量。
Methods 70 cases pregnant women (pregnant age ranging from 13 to 40 weeks) were examined by color Doppler ultrasound to measure the umbilical artery blood flow quantities of the normal foetuses.
方法应用彩色多普勒超声检测70例孕妇（孕13～40周）的正常胎儿的脐动脉血流量。
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