Register now for unlimited free access!

A valid email address. All emails from the system will be sent to this address. The email address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by email.
Several special characters are allowed, including space, period (.), hyphen (-), apostrophe ('), underscore (_), and the @ sign.
Provide a password for the new account in both fields.
Back to top

fragile X syndrome

This inherited disorder resulting from a defective X chromosome can produce mental and behavioral problems including or suggestive of ADHD, Autistic Disorder, mental retardation, as well as sensory integration and speech and language problems in addition to physical characteristics.

Books, etc.