Accurate Ultrasonic Estimation of Fetal Weight

William J. Ott; Sue Doyle; Sandy Flamm; Jackie Wittman

doi:10.1055/s-2007-999885

American Journal of Perinatology, Table of Contents

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

ORIGINAL ARTICLE

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

Abstract

ABSTRACT

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.

Full Text