I've had two medical scans, one at about 15 weeks and one at about 20 weeks. Since they were both fine and as SuperBub is in the correct position, etc, I was told that I wouldn't need any more. I did want to see SuperBub again though, so booked in for a 4D scan (in a clinic that didn't require a referral). It did cost over $200, but was fully worth it, especially as since SuperBub had her hand over her face, they gave me another appointment for free.