I had an ultrasound the other day and the tech said i was measuring a week behind and that my due date would change. I guess my doctor is agreeing with her. She asked if my periods were irregular and they aren't in fact I usually ovulate earlier because my periods are shorter like 24 days.

Was wondering if maybe they could be wrong on the dating scan and maybe the baby is just going to be a smaller baby... also found it a little strange they'd change the due date because ultrasounds aren't a perfect science. It even says right on it give or take up to 4 days so it's not exact.

Idk just confused a little. Anyone have experience with this?