how long do women stay pregnant
Pregnancy lasts for about 280 days or 40 weeks. A preterm or premature baby is delivered before 37 weeks of your pregnancy. 1  Extremely preterm infants are born 23 through 28 weeks. 2  Moderately preterm infants are born between 29 and 33 weeks. 3  Late preterm infants are born between 34 and 37 weeks.