For 2nd/3rd/4th etc moms

Ashley
I'm 37 weeks 4 days with my third today and I am fairly certain that my due date is pretty accurate. I'm just wondering how many moms (that knew when they conceived) had their babies on or very close to their due dates? I didn't track ovulation with my other two children so I just went by when my dr said my due date was and both of them were born before my due date. 
I guess I'm just trying to see if the moms that tracked their ovulation and knew almost to the day of conception had their babies well before their due dates or if it was pretty spot on. 
Thanks ladies!