Macrosomia: a new formula for optimized fetal weight estimation
Objectives To develop and test a specific formula for estimating weight in the macrosomic fetus. Methods Ultrasound estimations of fetal weight were carried out within 1 week of delivery in 424 singleton fetuses with a birth weight of ≥ 4000 g. Exclusion criteria were multiple pregnancy, intrauterin...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
[January 2010]
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| In: |
Ultrasound in obstetrics & gynecology
Year: 2010, Volume: 35, Issue: 1, Pages: 42-47 |
| ISSN: | 1469-0705 |
| DOI: | 10.1002/uog.7493 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/uog.7493 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/uog.7493 
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| Author Notes: | N.C. Hart, A. Hilbert, B. Meurer, M. Schrauder, M. Schmid, J. Siemer, M. Voigt and R.L. Schild |
| Summary: | Objectives To develop and test a specific formula for estimating weight in the macrosomic fetus. Methods Ultrasound estimations of fetal weight were carried out within 1 week of delivery in 424 singleton fetuses with a birth weight of ≥ 4000 g. Exclusion criteria were multiple pregnancy, intrauterine death and major structural or chromosomal anomalies. Stepwise regression modeling was used to derive a prediction formula with birth weight as the dependent variable and maternal booking weight and fetal biometric measurements as independent parameters. After a new formula for estimated fetal weight (EFW) had been developed in a formula-finding group (n = 284), it was compared with commonly used weight equations (evaluation group, n = 140). Results The new formula (logeEFW = 7.6377445039 + 0.0002951035 × maternal weight + 0.0003949464 × head circumference + 0.0005241529 × abdominal circumference + 0.0048698624 × femur length) proved to be superior to established equations, with the smallest mean error (mean ± SD, −10 ± 202 g), the smallest mean percentage error (mean ± SD, −0.03 ± 4.6%) and the lowest mean absolute percentage error (3.69 (range, 0.05-13.57)%) when studied in the evaluation group. With the new formula, 77.9% of estimates fell within ± 5% of the actual weight at birth, 97.1% within ± 10%, and 100% within ± 15% and ± 20%. Conclusions The new formula allows better weight estimation in the macrosomic fetus. Copyright © 2009 ISUOG. Published by John Wiley & Sons, Ltd. |
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| Item Description: | First published: 23 December 2009 Gesehen am 24.03.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1469-0705 |
| DOI: | 10.1002/uog.7493 |