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.
2
方法联合应用胎心无负荷试验（NST）及多普勒脐动脉血流速度测定对2 0 0例妊娠晚期孕妇进行观察。
Methods fetal non-stress test combined with fetal umbilical artery doppler velocimetry were used in 200 late pregnant women.
3
对其中536例孕妇在孕14 ~ 28周使用超声多普勒检测其脐动脉血流，并追踪其妊娠结局。
Among them, 536 cases were measured the umbilical artery index with color ultrasound Doppler during 14 to 28 weeks. In the end, the pregnancy outcome was record and analyzed.
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