Because its off of the measurement of the fetus...not everyone ovulated that standard ovulation calculator....so going off the calendar isn't always accurate..
that's what I was thinking cause I remember having a normal period on time as usual at the end of August and since I didn't know the exact day they did an ultra sound to see and that's when she said I got pregnant the first week of September
My due date is may 25. My ovulation date was sept. 1! My last period was August 18, & that's what the doctors base your due date off of. They probably just told you your ovulation time, but regardless pregnancy is always based on your period. Don't over think it. Your due date is correct. :)
I am due May 12. I know I got pregnant on or around August 17th because we were marking when we had sex.
so you think I did get pregnant the first week of September?