OP06.09: Does fetal growth predict low birthweight in suspected late fetal growth restriction?

To evaluate the prediction of low birth weight (BW) using longitudinal individual fetal growth measurement in suspected late restriction (FGR). This is a secondary analysis from multicentre observational study (TRUFFLE2) April 2017 to July 2018.Women at 32–36 weeks with suspect FGR (estimated (EFW) p40) were monitored by 2-weekly biometry and Doppler assessment. Umbilico-cerebral ratio (UCR) ≥ 0.9 was classified as abnormal categorised for gestational age (GA) (32-33, 34-36 37 weeks) first value never abnormal. Individual calculated regression all available EFW measurements each fetus least two measurements. The probability BW < 1500g, 2000g 2500g logistic MoM inclusion either UCR GA categories, (gr/week) both independent parameters. A Receiver Operating Characteristic (ROC) curve area under (AUC) computed. 696 856 included women (17 infants major congenital abnormality excluded) had more EFW. Table 1 shows AUC 95% confidence limits sensitivity specificity 80%, ROC graph additional parameter. Fetal categories similarly effective but combining did not improve prediction. values approximately below 1500-2000 g. repeated allows fairly reliable very BW. evidence cerebral redistribution does