6 week Ultra Sound Accuracy?????????????

[kathy811517]

I want to know if i had two ultra sounds down with a few days in the same week and both date me as 6 weeks +- 3 days how accurate is that to put my Due date at April 3rd. And if so where is my margin of conciving and Ovulation margin period? Per Ultra sound the baby is 4 weeks and 2 weeks are just Period and time frame under conception.

Confused!

[Ellen038]

Once you start getting scans they are the most accurate way of determining your due date.  It is not uncommon to  measure a couple days less or more then you really are.  

[shastas84]

For the first two weeks of pregnancy you're not actually pregnant. But for dating purposes they go from the first day of your last period. The earlier the ultrasound the more likely it is to be accurate. I'm sure the due date is really close. ;)