3D/4d ultrasound at 15 weeks?!?

Savannah

I want to do a 3D or 4d ultrasound at 15 weeks to determine the gender. My Drs. Office cannot do the gender anatomy scan until after Christmas and I would really like to know before then. I booked an appointment at a 3D ultrasound studio who claims they can tell gender at 15 weeks. Does anyone have any experience with places like this??! Thanks in advance