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Updated: Jul 3, 2026
A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
Published on: October 24, 2017
Weight estimation by three-dimensional ultrasound imaging in the small fetus
R L Schild1, M Maringa, J Siemer
1Department of Obstetrics and Gynecology, University Women's Hospital, Erlangen, Germany. ralf.schild@uk-erlangen.de
Objectives:
To improve birth weight estimation in fetuses weighing
Methods:
In a prospective cohort study, biometric data of 150 singleton fetuses weighing
Results:
Different statistical estimation strategies were pursued. Gradient boosting with component- wise smoothing splines achieved the best results. The resulting new formula (estimated fetal weight = 656.41 + 1.8321 x volABDO + 31.1981 x HC + 5.7787 x volFEM + 73.5214 x FL + 8.3009 x AC - 449.8863 x BPD + 32.5340 x BPD(2), where volABDO is abdominal volume determined by 3D volumetry, HC is head circumference, volFEM is thigh volume determined by 3D volumetry, FL is femur length and BPD is biparietal diameter) proved to be superior to established equations in terms of mean squared prediction errors, signed percentage errors and absolute percentage errors.
Conclusions:
Our new formula is relatively easy to use and needs no adjustment to weight percentiles or to fetal lie. In fetuses weighing
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