We still do not know the exact reason for this difference between boys and girls. Many theories have been presented to explain the ratio of stuttering between boys and girls. The most accepted theory is that girls can cope better with the stuttering because of their earlier development of language. The following are the three major risk factor influencing the development of stuttering. First, the sex of the child is a factor in children who stutter.
Boys are more likely to stutter than girls.
Second, the age of a child influences the presence of stuttering. Stuttering can emerge at any age, but it is more likely to begin by age 5 or 6 years. Third, a child is at a greater risk of stuttering if any members of the family stutters. Inheriting the predisposition to stutter is a possible answer to why stuttering runs in families but is questioned by some researchers. There have been various studies performed to determine the familial incidence of stuttering and the results of these studies vary widely.