Mazzone E, Dall'Asta A, Kiener AJO, et al. - Researchers sought to determine the accuracy of two-dimensional (2D) ultrasound (US) vs three-dimensional (3D) US with two different methods of projection for the identification of fetal macrosomia at term. In this prospective study, they included 230 women who were at risk for fetal macrosomia and were referred for fetal biometry between 34⁺⁰-36⁺⁶ weeks. The performance of 3D-US-estimated fetal weight (EFW) vs 2D-US-EFW was comparable in the prediction of macrosomia at term. This was evident irrespective of the method used for the projection of the EFW. They identified different properties of the techniques following paired comparison between 2D-US-EFW and 3D-US-EFW with either method of projection of the EFW at birth; 2D-US-EFW was associated with higher sensitivity and 3D-US-EFW was associated with higher specificity, PPV and LR⿿+⿿. This infers a possible complementary role of the techniques which justify an evaluation in future research.