Yes, I know it's difficult to believe this! Fragile X Syndrome causes lax muscles all over the body and that of course includes the mouth too. So I would purée all his meals till he was 3 years old. While therapy was on to strengthen his muscles and help him speak, chewing was also a big problem. It is imperative to understand that the impact of Fragile X Syndrome is way beyond intellectual disability. This muscle hypotonia causes concerns with gross motor development like, walking, running and