French fetal biometry: reference equations and comparison with other charts
Article first published online: 28 MAR 2006
Copyright © 2006 ISUOG. Published by John Wiley & Sons, Ltd.
Ultrasound in Obstetrics & Gynecology
Volume 28, Issue 2, pages 193–198, August 2006
How to Cite
Salomon, L. J., Duyme, M., Crequat, J., Brodaty, G., Talmant, C., Fries, N. and Althuser, M. (2006), French fetal biometry: reference equations and comparison with other charts. Ultrasound Obstet Gynecol, 28: 193–198. doi: 10.1002/uog.2733
- Issue published online: 21 JUL 2006
- Article first published online: 28 MAR 2006
- Manuscript Accepted: 25 JUN 2005
- fetal biometry;
To construct new reference charts and equations for fetal biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur length (FL), using a large sample of fetuses examined at 15–40 weeks in France, and to compare them with previous references.
The study data were obtained over a continuous 1-year period from a population of pregnant women undergoing ultrasound examination. Excluded were those with a known abnormal karyotype or congenital malformation, multiple pregnancies, and those with no first-trimester dating based on crown–rump length. No fetuses were excluded on the basis of abnormal biometry or birth weight. For each measurement, separate regression models were fitted to estimate both the mean and the SD at each gestational age.
Full biometric measurements were obtained for 19 647 fetuses. New charts and reference equations are reported for BPD, HC, AC and FL. Prediction intervals for the new reference charts were similar to those of previous ones, whereas there were some differences in predicted centiles.
We present new French reference charts and equations for fetal biometry. They can be used easily to compute centiles and Z-scores to control the quality of biometric assessments and to evaluate their performance relative to other references. Copyright © 2006 ISUOG. Published by John Wiley & Sons, Ltd.