Conclusions Examining blood flowvelocitywaveforms of UmA by Color Doppler ultrasound was one of the best method to early diagnose and predict the prognosis of IUGR.
结论彩色多普勒超声可直接测定脐动脉血液循环，能在早期诊断IUGR、判断病情及估计预后。
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ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flowvelocity (S/D) of umbilical artery flowvelocitywaveforms at second-trimester pregnancies.