I have went to a doctor with 4D, each visit I have to paid $750, but I was only 8 wks, 10.5wks, 14 wks, but no DVD and only 2 pictures, and I don't think that the 4D show anything that you want to see, but the doctor can show me the baby's sex when I was 10.5 wks (but when using the 2D)