Fragile x syndrome, is it preventable, how?

Not preventable. while there is no way to prevent fragile X disorder, treatment with folic acid, a vitamin can be helpful with the behaviours if necessary. Behavioral therapy, applied behavioral analysis, A variety of medications are available for symptoms. You should consult a specialist working with children with Fragile X.
No. Not known to be preventable. Diagnosis is made by genetic testing. No medication to specifically treat fragile x. Treatment is aimed at the effects from autism, tremors, etc.