How accurate are ultrasounds at 16 weeks?

if they can see anything it would be very accurate, the problem is at this point the baby is usually in the head down fetal position and there is not alot of room in there to move around and being...

You ussally dont get a ultrasound till 4 mounths

Could be a few days either direction.

We found out at 16 weeks what we were having. It's possible but only if your baby cooperates.

Very. However dr's and nurses are human and do make mistakes but it is rare.