3d Ultrasounds...

Samantha
Anyone get one? How soon can you go for it to be accurate? I went to the Dr today but baby wasn't in a good position for them to even take a guess. Next appt isn't until August and I can't take the supense. I'm thinking of going for a private 3d scan around 16 weeks or so. Wondering if that's a good time to get an accurate response.