Its not so much that they think all lefties are brain damaged its more that because ultrasounded babies have a higher percentage of left handedness than non-ultrasounded ones, they know that "something" is being done to the brain to change it to left handed - so it *could* be a *sign* of damage.
Its not that being left handed itself is bad, its just concerning that if ultrasound can slightly increase the incidence of left handedness - what else might it be slightly increasing the incidence of? Pretty difficult to prove. Like the article said, if you have a good reason to have an ultrasound - you should do it.
(Edited to emphasise the "could" and "sign" and added second paragraph)
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