Do you guys count how many weeks you are from the due date given or measurement of baby?

Damira

Due

may 17 which would make me 9 weeks 1 day transvaginal done at 8 weeks 5 days ( 2days ago) but baby was measured at 8 weeks one day so she said It was off a few days. Do you guys count how many weeks you are from the due date given or measurement of baby?