which term best descirbes the infants that are born therre weeks or more before the pregnancy has reached its full term?

Preterm

Explanation:

World Health Organization states that the preterm birth or more commonly known as premature birth is defined as the birth of a child before 37 weeks of gestational age. The high rate of preterm births not only caused complications in the child but claimed 1 million lives every year. Although the exact reason varies person to person, some causes are genetic influences, diabetes, problem of blood pressure, psychological stress, etc.