The ultrasound due date is usually the most accurate. I had 3 due dates the 15,16, & 21 of June lol doctor decided to go with the ultrasound date of the 21st. I'm still getting delivered on the 13th so either way you look at it, my baby meets the full term requirements (37 weeks and over)
I would go with the measurement of baby. My due date changed 4 days ahead than my cycle due date.
It's only a week difference...
I'd go with the ultrasound date. You may have ovulated later then you think and that would make it a different date
I would think the later one based on your ultrasound would be more accurate, cause they are basing it on baby's measurements. When I went in for my first appt, based on my last period, my due date was 10/27. But when they did my 8wk ultrasound, and measured baby, they changed it to 11/3.