A birth that occurs before the 37th week of pregnancy.
A pregnancy normally lasts about 40 weeks. Some risk factors for a preterm birth include having a previous preterm birth and being pregnant with multiples. Complications associated with a preterm birth include immature lungs, difficulty regulating body temperature, poor feeding, and slow weight gain.
Preterm babies may need longer or more intense nursery care, medications, and sometimes surgery and Occupational, Speech and Physical Therapy