The NICU Newborns who need intensive medical attention are often admitted into a special area of the hospital called the neonatal intensive care unit. Problems and Conditions These range from weight and growth problems to breathing and blood disorders, fever, and infections. Birth Defects and Genetic Disorders Birth defects are also called "congenital anomalies" or "congenital abnormalities." "Congenital" means "present at birth." "Anomalies" and "abnormalities" mean there is a problem present in a baby.