Stuttering: risk factors

Family history

There is now strong evidence that almost half of all children who stutter have a family member who stutters. The risk that your child is actually stuttering instead of just having normal disfluencies increases if that family member is still stuttering. There is less risk if the family member outgrew stuttering as a child.

Age at onset

Children who begin stuttering before age 3 1/2 are more likely to outgrow stuttering; if your child begins stuttering before age 3, there is a much better chance she will outgrow it within 6 months.

Time since onset

Between 75% and 80% of all children who begin stuttering will stop within 12 to 24 months without speech therapy. If your child has been stuttering longer than 6 months, he may be less likely to outgrow it on his own. If he has been stuttering longer than 12 months, there is an even smaller likelihood he will outgrow it on his own.

Gender

Girls are more likely than boys to outgrow stuttering. In fact, three to four boys continue to stutter for every girl who stutters. Why this difference? First, it appears that during early childhood, there are innate differences between boys' and girls' speech and language abilities. Second, during this same period, parents, family members, and others often react to boys somewhat differently than girls. Therefore, it may be that more boys stutter than girls because of basic differences in boys' speech and language read more