Do you have any places where you can get a 4D scan done. I,m having one when I,m 18+ weeks and they would def. be able to tell you the sex because it's 4D.
DW had a 4D scan at 26 weeks, and we were told we wer having a girl. They even pointed out the 3 lines blah blah blah. 14 weeks later, out came a boy.

We had ours done at a place called Fetal Fotos at Henly Beach (in Adelaide)

Mick