When I had my scan with Iz he did sort of a close up shot of the genital region I guess and there were 3 white lines that are the ovaries and something else I can't remember, so unless as Georgi said, it was all hanging out and was definately a boy, it could be a girl?? Hard to say thogh because of the angle they do these, mine was also 70% certain it was a girl and it was right so who knows??
Good luck with it!