EP05.08: Fetal biometry and growth charts: Indian population – Phase II

•Methods: 11567 patients were included in the present study to measure BPD( Biparital diameter), HC ( Head circumference), AC ( Abdominal circumference) ,FL ( Femur length) and EFW (expected fetal weight). Statistical analysis has been performed using MS excel 2010. Data analyzed as recommended by Altman, Chitty and Royton.For each measurement, polynomial regression models were fitted separately to estimate the mean and standard deviation (SD) as functions of gestational age. The SD was modeled via the absolute residuals from the regression to estimate the mean. Determination of 1, 3, 5th, 10, 50, 90, 95 and 99 centile curves require k = -2.326, -1.96, -1.645, -1.282, +1.282, +1.645, +1.960 and +2.326 respectively. Regression equations were derived with polynomial regressions where R-value is closure to 1.