conception date

[SamanthaPrane]

I'm really confused on when I got pregnant my due date is May 27th and my dr and ultra sound tech said I got pegnant the first week of September but when I looked on the calander myself it said I got pregnant around August 20th so why am I getting two diff conception dates I would think my dr and ultrasound tech know what they are talking about but it just confused me as to why I got a diff date then them so I was wandering if anyone else is due around the same time as me and when you conceived

[SamanthaPrane]

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

[kiki24115]

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..