The traditional definition of GDM which is still used by ACOG1 is any degree of glucose intolerance that either commences or is first diagnosed in pregnancy. Diabetes is the most common medical complication of pregnancy, women can be separated into those who were known to have diabetes before pregnancy-Pregestational or overt & those diagnosed during pregnancy-Gestational Diabetes. All Antenatal women attending op who are normoglycemic in second trimester are followed in third trimester at 32-34 weeks and repeat Glucose Tolerance Test is done and looked for any abnormal values so that new cases of gestational diabetes mellitus cases are found. Among the study population,15% of population had EFW >90th centile at 32-34 weeks gestation, In GDM mothers 40.9% had EFW >90th centile