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Causes of stuttering in children. We donât really know why stuttering happens. It might be because thereâs an error or delay in the message that a childâs brain sends to the muscles of her mouth when she needs to speak. This error or delay makes it hard for the child to coordinate her mouth muscles when sheâs talking, which results in stuttering.
Developmental stuttering. Developmental stuttering occurs in young children while they are still learning speech and language skills. It is the most common form of stuttering. Some scientists and clinicians believe that developmental stuttering occurs when children's speech and language abilities are unable to meet the child's verbal demands. Developmental stuttering also runs in families. In 2010, for the first time, NIDCD researchers isolated three genes that cause stuttering.