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A comparison of two different ultrasound methods for estimating fetal weight in preterm gestations

A comparison of two different ultrasound methods for estimating fetal weight in preterm gestations A prospective study was conducted to evaluate the estimation of fetal weight in preterm pregnancies by use of ultrasound measurements. Two equations for estimating fetal weight, one proposed by Shepard and associates and the other by Hadlock and associates, were evaluated. The ability to estimate fetal weight accurately was evaluated with respect to birth weight and menstrual age. Shepard's equation is associated with a lower mean signed percent error than Hadlock's, when the birth weight is less than 1500 g (4% vs 12%) or when the menstrual age is between 23 weeks to 30 weeks (2% vs 10%). However when the birth weight is between 1500 g and 3500 g, or the menstrual age is between 31 weeks to 36 weeks, Hadlock's equation has a lower mean signed percent error: 1% vs −4% for the birth weight category and 2% vs −3% for the menstrual age category. In preterm gestations both equations estimate fetal age weight with a low mean signed percent error–Shephard's −0.4% versus Hadlock's 6.0%. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Clinical Ultrasound Wiley

A comparison of two different ultrasound methods for estimating fetal weight in preterm gestations

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References (19)

Publisher
Wiley
Copyright
Copyright © 1988 Wiley Periodicals, Inc., A Wiley Company
ISSN
0091-2751
eISSN
1097-0096
DOI
10.1002/jcu.1870160703
Publisher site
See Article on Publisher Site

Abstract

A prospective study was conducted to evaluate the estimation of fetal weight in preterm pregnancies by use of ultrasound measurements. Two equations for estimating fetal weight, one proposed by Shepard and associates and the other by Hadlock and associates, were evaluated. The ability to estimate fetal weight accurately was evaluated with respect to birth weight and menstrual age. Shepard's equation is associated with a lower mean signed percent error than Hadlock's, when the birth weight is less than 1500 g (4% vs 12%) or when the menstrual age is between 23 weeks to 30 weeks (2% vs 10%). However when the birth weight is between 1500 g and 3500 g, or the menstrual age is between 31 weeks to 36 weeks, Hadlock's equation has a lower mean signed percent error: 1% vs −4% for the birth weight category and 2% vs −3% for the menstrual age category. In preterm gestations both equations estimate fetal age weight with a low mean signed percent error–Shephard's −0.4% versus Hadlock's 6.0%.

Journal

Journal of Clinical UltrasoundWiley

Published: Sep 1, 1988

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