Neonatology is a branch of pediatrics that deals with the premature or ill infants. Neonatal intensive care unit (NICUs) is the important constituent of neonatology. The new-born infants who are suffering from low birth weight, congenital malformations, sepsis, pulmonary hypoplasia, birth asphyxias and prematurity are treated in the NICUs. Practising physician in the area of neonatology is referred as neonatologist.