314: Femur length ratios as predictors of adverse outcome in fetuses: Results from the PORTO Study

To determine whether femur length, used in a ratio with head biometry, is a better predictor of adverse outcome than abdominal circumference in small for gestational age (SGA) pregnancies. The PORTO Study recruited 1,200 ultrasound-dated singleton IUGR pregnancies, defined as EFW < 10th centile, between 24+0 and 36+6 weeks gestation. All eligible pregnancies underwent ultrasound evaluations for estimated fetal weight every 2 weeks until birth;...