Prevalence
Worldwide, the incidence of IEM is more than 1/1000. In India, diagnosis or new born screening is limited leading to many cases going undiagnosed. According to WHO figures, 5 million children die in the first month of life in developing countries and 4 million children are born with some congenital anomaly. Thousands of children die of no definable reason. Almost 27 - 30 % of these babies are now proved to be having some IEM disease. About 5 to 15 % of all sick neonates in NICU are expected to have some Inborn Error of Metabolism