The relationship between peak-systolic/end-diastolic ratio of the umbilical artery wave forms and fetal biometry was studied in 223 uncomplicated pregnancies with established dates between 20 and 42weeks' gestation. At each ultrasonographic
examination
fetal biometry included measurement of the biparietal diameter, head circumference, abdominal circumference, and femur length. The peak-systolic/end-diastolic ratio was measured by a pulsed wave method. Regression curves, including the 5% and 95%
confidence interval, were developed between each biometric parameter(biparietal diameter, head circumference, femur length and estimated fetal weight) and peak systolic/end-diastolic ratio.
@ES The results were summerized as follows
@EN 1. There were significant correlations between the peak-systolic/end-diastolic artic and individual ulatrasonographic parameters from gestation 20 weeks to 42 weeks (P<0.0001).
2. Of the individual ultrasonographic parameters, estimated fetal body weight was found to be best correlated with the peak-systolic/end-diastolic ratio (R=0.656).
3. Under gestation 30 weeks, the BPD was found to be best correlated with the peak-systolic/end-diastolic ratio (R=0.240).
4. Over gestation 30 weeks, abdominal circumference was found tobe best correlated with the peak-systolic/end-diastolic ratio (R=0.467).
We therefore conclude that these normograms will be useful in evaluating patients with unknown dates and the value of the fetal biometric normograms to assess IUGR should be more studied in the future.
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