Background: Determination of correct Gestational age (GA) is a fundamental to obstetric care and is important at autopsy as well as for clinical assessment of growth of the fetus. Various fetal parameters like fetal anthropometry used for calculation of GA. The aim of the present study was to study correlation between the fetal anthropometric measurements like Crown-Rump length (CRL), Femur length (FL), Head Circumference (HC), Bi-Parietal diameter (BPD) and Abdominal Circumference (AC) and Gestational age to derive regression equations for the same.