Conclusion: It has opened a new way in the early diagnosis of IUGR to use the color ultrasound doppler to detect the S/D, PI , RI and other hemodynamical changes of navel artery.

• 结论：利用超声多普勒技术测定胎儿脐动脉血流频谱的变化，为临床早期诊断胎儿宫内生长迟缓提供了一条途径。