The more we understand stuttering, the better we can educate others about it. The NSA has partnered with leading stuttering specialists and researchers to provide accurate information about stuttering. Here are a few facts about stuttering: Stuttering usually begins in childhood, between the ages of 2 and 5 years. It’s estimated that about 1% of the world’s population stutters, though about 5% of children go through a period of stuttering. Stuttering can begin gradually and d