Final answer:
An infant is considered premature if born before 37 weeks of gestation.
Step-by-step explanation:
An infant is considered premature if born before 37 weeks. This means that if a baby is born before 37 weeks of gestation, they are considered premature. The development of a fetus usually takes around 40 weeks, and by week 37, all of the organ systems are developed enough that the baby could survive outside the uterus without many risks associated with premature birth.