Stuttering can be genetic as research has found that stuttering can be inherited.  Children can develop stuttering at an early age and if they do not grow out of it then it can also continue into adulthood.  There have been numerous studies done looking at genetics and stuttering and evidence strongly suggests that there is a link. There have been many twin studies published which resourced monozygotic and dizygotic twins. They found that monozygotic twins ( identical twins) showed a higher similarity when it comes to stuttering compared to dizygotic (fraternal twins). This evidence shows that there could be a strong link between genetics and stuttering.