I was just wondering because my birthday is July 17th, and I'll be about 38 weeks and 4 days pregnant then. The baby is due July 27th according to my first ultrasound at 16 weeks and July 28th according to my second ultrasound at 20 weeks. We go with the 28th because the 27th is my ex boyfriend's birthday... lol, but I've been told that earlier ultrasounds are more accurate.
Anyways, is there a certain percentage of first time mom's who give birth before 40 weeks? I know it's more likely for them to go passed their due date, but just wondering if there is an average of before.