Am J Perinatol 1986; 3(4): 307-310
DOI: 10.1055/s-2007-999885

© 1986 by Thieme Medical Publishers, Inc.

Accurate Ultrasonic Estimation of Fetal Weight

Prospective Analysis of New Ultrasonic FormulasWilliam J. Ott, Sue Doyle, Sandy Flamm, Jackie Wittman
  • Division of Maternal and Fetal Medicine, Department of Obstetrics and Gynecology, St. Louis University Medical School, and St. Mary's Health Center, St. Louis, Missouri
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04. März 2008 (online)


Five new ultrasonic weight formulae incorporating head circumference, fetal femur length, and a correction for oligohydramnios were prospectively analyzed in a group of 198 unselected patients scanned within 72 hours of birth. Comparison with the Shepard formula showed that inclusion of these parameters slightly, but significantly, improved the random error of weight estimation. The best-fit formula was: Log (10) BW = .04355HC + .05394AC - .0008582HC × AC ± 1.2594 (FL/AC) - 2.0661.