a system for providing appropriate care to all mothers and infants within a specific geographical region. Perinatal care may be provided at primary (Level I) , secondary (Level II), or tertiary (Level III or IV) centers depending on the risk status of mother and baby. The low-risk pregnancy can be managed at a primary center-a regular hospital delivery room and nursery, where basic emergency equipment and trained personnel are available if needed. A secondary center has trained staff and special equipment to care for a pregnant woman or for an infant with moderate problems. A tertiary, or third level, center has all the staff and technology needed to manage serious medical problems of the mother or infant. Intensive care nurseries are usually found in Level II, III or IV (tertiary) centers.