Gestational age is the age of unborn baby. Proper assessment of foetal well–being requires an accurate knowledge of gestational age of the fetus. Developmental status can be assessed by noting out the progressive differentiation, growth and maturation of the organ system of the body. Almost any organ system in the body may be used to assess developmental status, providing that it manifests progressive differentiation, growth and maturation. 100 dead fetus preserved in 10% formalin solution were analysed in this study and various parameters such as Crown heel length, Biparietal diameter, Head circumference, Chest circumference, Abdominal circumference were measured and correlated with the gestational Age of fetus