I needed my ultrasounds! The first to prove to DH that I was pregnant and didn't have a brain tumour, the second because DH was worried about trisomy risks, then the third and fourth as a check-up. I could happily have no ultrasounds too, but it is very, very useful for showing DH there's a baby in there!

I don't think there's a risk with a sensible amount of ultrasounds, obviously having them twice a week is a bit over the top and there's no real need for it.

BTW, DH has dyslexia and I'm left-handed, neither of us were scanned as a foetus. My sister was scanned and is very intelligent and not at all a freaky mutant, even if she is right-handed.