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Updated: Jun 26, 2026
06:43
High Frequency Ultrasound for the Analysis of Fetal and Placental Development In Vivo
Published on: November 8, 2018
A new sonographic weight formula for fetuses <or= 2500 g
1Obstetrics and Gynaecology, University Hospital, Mannheim. joern.siemer@gyn.ma.uni-heidelberg.de
Ultraschall in Der Medizin (Stuttgart, Germany : 1980)
|January 13, 2009
Summary
A new formula accurately estimates fetal weight in infants under 2500 grams. This improves obstetric management for small fetuses, reducing neonatal morbidity and mortality risks.
Area of Science:
- Perinatal medicine
- Medical imaging
- Biostatistics
Background:
- Birth weight is crucial for predicting neonatal outcomes.
- Accurate fetal weight estimation aids obstetric management.
- Existing formulas show inaccuracies, especially for low birth weight infants.
Purpose of the Study:
- Develop a specific formula for estimating fetal weight in fetuses <= 2500g.
- Compare the new formula's accuracy against established weight equations.
Main Methods:
- Included 260 singleton pregnancies with birth weight <= 2500g.
- Ultrasound biometry obtained within 7 days of delivery.
- Stepwise regression analysis used to create and validate the new formula.
Main Results:
- New formula achieved a mean absolute percentage error of 7.71%.
- Demonstrated the highest intraclass correlation coefficient among tested formulas.
- Showed minimal underestimation and the narrowest range of agreement.
Conclusions:
- The developed formula enhances accuracy in fetal weight estimation for low birth weight fetuses.
- Proper application can lead to improved clinical decision-making and patient outcomes.
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