38 weeks via ultrasound

It's normal to give birth before or after your due date. In fact, your pregnancy must continue two weeks past your due date to earn the official label of postterm pregnancy. You might be more likely to have a postterm pregnancy if: This is your first pregnancy You've had a prior overdue pregnancy Your baby is a boy You have a body mass index of 30 or higher (obesity) Your due date was calculated incorrectly, possibly due to confusion over the exact date of the start of your last menstrual period or if your due date was based on a late second- or third-trimester ultrasound.