Preterm infant is defined as -
Preterm is defined as babies born alive before 37 weeks of pregnancy are completed. Subcategories include- 1. Extremely preterm is less than 28 wks 2. Very preterm 28 to 32 wks 3. Moderate to late preterm 32 to 37 wks Reference Park&;s textbook of preventive and social medicine 23rd edition pg 536
Born between 37-42 weeks
Born > 42 weeks
Born < 37 weeks
Born <25 weeks
obstetrics,pediatrics and geriatrics