Journal of Ultrasound in Medicine, Vol 3, Issue 2 75-79, Copyright © 1984 by American Institute of Ultrasound in Medicine
Estimation of gestational age from measurements of fetal long bones
P. Jeanty, F. Rodesch, D. Delbeke and J. E. Dumont
The general practice of using fetal long bone growth charts to derive
gestational age does not yield mathematically valid results. The authors
tried to calculate gestational age from the lengths of long bones (femur,
humerus, tibia, ulna) from 12 to 40 weeks of gestation. The combined use of
the four bones allows a good estimation of gestational age that may be
useful should the biparietal diameter measurement be unreliable,
unobtainable, or abnormal.
