Fetal biometry and fetal weight estimation: JSUM standardization

From the clinical point of view, it is very important to standardize methods of fetal growth evaluation. The standardization committee of fetal measurement of the Japanese Society of Ultrasound in Medicine (JSUM) announced the recommended standard procedure for fetal biometry, calculation of estimated fetal weight (EFW) and their evaluation method. In short, the abdominal circumference (AC) by the ellipse-tracing method should be the standard for the fetal abdominal measurement and the EFW should be calculated by the following formula:

EFW = 1.07 × BPD. + 0.30 × AC × FL,

where BPD is the biparietal diameter and FL the femur length.