brain damage causing left-handedness in babies
Speaking as a Leftie (who had no u/s scans as a foetus), bring on the brain damage! I have seen these studies - if you do the tummy ultrasound for about a week a month (constantly) then maybe there'll be something going on, they did show that with huge doses in rats. While I agree that "curiosity" u/s scans aren't good, being left-handed does not mean you're brain damaged! And my wonderful (and also left-handed) sonographer agrees with me!