Is Stuttering In Our DNA?

Bruce Willis, Marilyn Monroe, and Carly Simon all suffered from stuttering. Today, three million more Americans do, too. Most are able to overcome the handicap, which afflicts 5% of all children -- but childhood suffering from stuttering can be traumatic, producing educational, social, and occupational disadvantages.  Prof. Yairi and his fellow researchers are now reporting strong evidence for a significant genetic component to stuttering. They've established that the likelihood of both a spontaneous recovery from stuttering and the development of a chronic disorder are genetically linked.

http://www.sciencedaily.com/releases/2008/11/081106122256.htm