My guess is that it's not been tested. I'm sure you wouldn't want your baby to have any neurological problems. I find the thought of electric pulses going through a developing mind frightening. I have a daughter who has pretty sever dyslexia. Since I was a health food fanatic while I was pregnant with her and while she was small I have no idea what may have caused this. I did however use formula so maybe that is why. I am mildly dyslexic but have overcome it so you could say it's heriditary but I am thinking it's caused by something while the brain was developing. I definitly wouldn't risk it.