P909 Physical conditioning of pregnant women participating in a randomized controlled trial in Campina Grande, Brazil

Abstract

Electronic poster abstracts of Rogers, Fok 2003 and Guangzhou studies but weighted more than those of Woo and Fok 1987 studies. The percentage of SGA neonates was underestimated by Woo (6.0%), Fok 1987 (2.7%) and Fok 2003 (1.8%) percentiles. On the other hands, the percentage of LGA neonates was overestimated by Woo (13.6%) percentiles but underestimated by Rogers (8.8%) and Fok 2003 (2.2%) percentiles. Conclusions:The new birthweight reference in our study showed a small increase trend in birthweight of term and post term infants especially when compared with older studies. On the other hands, mildly preterm infants in our study weighted less than those from recent studies. It is important to utilise an updated reference to avoid misclassification of SGA and LGA infants in clinical management. EP19.13Maternal factors associated with fetal thigh circumference at 36th week of gestation EP19.15 Abstract withdrawn EP19.16 Prediction of fetal macrosomia using two-dimensional and three-dimensional ultrasound Objectives: The estimation of fetal weight is known to be increasingly inaccurate at advanced gestation and in the case of fetal overgrowth. The objective of this study was to compare the accuracy of two-dimensional (2D) and three-dimensional (3D) ultrasound (US) for the identification of fetal macrosomia at term. Methods: Single centre prospective study which included women at risk for fetal macrosomia referred for fetal biometry between 34 and 38 weeks. The estimated fetal weight (EFW) was computed using 2D US and the Hadlock Model IV or through 3D US and the Model VI by Lee et al. The projection of the EFW at the time of delivery was performed by using Yudkin's chart percentiles and the gestation-adjusted projection (GAP) method. Results: Overall, 230 patients were included. A significant correlation between the EFW percentile and the birthweight percentile was found both for the 2D-US-EFW centile (0.654, r 2 0.430, p <0.001) and the 3D-US-EFW centile (0.678, r 2 0.460, p <0.001) as well as for the 2D-US-EFW-GAP and the 3D-US-EFW-GAP (0.600, r 2 0.360, p <0.001 and 0.629, r 2 0.396, p <0.001, respectively). At ROC curve no difference was found in the prediction of birthweight ≥ 90 th centile using 2D-US-EFW