Estimation of fetal weight in twins: a new mathematical model.
S OngA P SmithA FitzmauriceD CampbellPublished in: British journal of obstetrics and gynaecology (1999)
Femur 4 requires measurements of femur length and abdominal circumference only, hence avoiding the need to obtain difficult head measurements which is a common problem in twins. It is a good model for estimation of fetal weight in twins. However, prediction of growth discordancy remains problematic.