Manipal Hospital (An associated tertiary Hospital of the Manipal Academy of Higher Education) Bangalore. Objectives : To establish normal ranges for fetal nasal bone length measurements throughout gestation among Indian population and to determine whether a different normal range for fetal nasal bone should be used for Indian population. Method : Normal fetal Nasal bone length ranges were generated using prenatal measurements by a standardized technique in 2747 fetuses. Results : Nomogram of fetal nasal bone length was established for the Indian population.