what age is a newborn considered
By Age: Birth and Newborn. A newborn baby is called a neonate for the first 28 days of life. This first month is a relatively high risk period for babies. Death rates: The overall infant (. Top Ten Causes of Death: For neonatal infants aged less than 28 days, the top ten causes of death in USA 1999 were: 1  disorders related to prematurity and low birth weight (23.1%),