what gestational age constitutes preterm labor
Participants were followed from year of first birth until 2005. We defined gestational age as very preterm (20 to â¤32 weeks), moderate preterm (33 to â¤37 weeks), term (38 to â¤42 weeks), and postterm (â¥43 weeks). We defined low birth weight as an infant born at term weighing less than 5.5 pounds, and we defined macrosomia as an infant born at term weighing 10 pounds or more.