An infant or baby is the very young offspring of humans. A newborn is an infant who is within hours, days, or up to a few weeks from birth. In medical contexts, newborn or neonate (from Latin, neonatus, newborn) refers to an infant in the first 28 days after birth.
The term "newborn" includes premature infants, postmature infants and full term newborns. The term infant is derived from the
Latin word infans, meaning "unable to speak" or "speechless." "Infant" is also a legal term referring to any child under the age of legal adulthood.
Infants cry as a form of basic instinctive communication. A crying infant may be trying to express a variety of feelings including hunger,
discomfort, overstimulation, boredom, wanting something, or loneliness.