Dear Mr. Goyal, At best, stem cell therapy is experimental in nature. I would be unable to either recommend it to you or deter you from going ahead. You should visit a stem cell therapy center and meet the doctor first and resolve all the doubts before you go ahead with it. You should note that the same thing applies to chelation therapy for autism. Beware of money-making rackets! Do your own research before submitting your son to an experiment which is likely very expensive. Remember also that autism tends to reduce as the child grows older. I hope you are going to the counsellor and their multi-pronged behavioural remedial therapy!