I had an ultrasound and it said I was 9 weeks pregnant. How accurate is that?

I had an ultrasound and it said I was 9 weeks pregnant. How accurate is that?
Question by babyvic: I had an ultrasound and it said I was 9 weeks pregnant. How accurate is that?
It would be nice to only hear from those who are sonographers or nurses who work with OBGYN. I did look it up online so I guess I truly know, but I like reassurance (going to talk with the doc on the next appt.)

Oh and I did have NT testing done and I did not ask if the gestation matched up, but I am assuming it

3d ultrasound pictures