Stuttering is an oral communication disorder and is characterized by interruptions in the production of speech sounds, also called "dysfluencies" (American Speech-Language-Hearing Association, 2014). It usually emerges in childhood and affects approximately 5% of the population (Guitar, 2006), although there is some variation in the incidence of stuttering across different studies. During childhood, it is common for children to experience dysfluency due to the complex process of language acquisition and development. These disfluencies are normal and tend to disappear in 80% of children, however for some they can evolve into a chronic state called developmental stuttering. Stuttering can also occur in two other circumstances, from lesions, called acquired or neurogenic stuttering and another, which involves psychological aspects (Oliveira et. al., 2012). Perkins, Kent, and Curlee (1991) focused on theories to explain the possible causes of disfluency and theorized that speech disruption and time pressure are the two important variables that can explain stammering disfluency. There are many studies investigating the causes of stuttering, however the etiology of stuttering still remains uncertain. According to these studies, genetic predispositions play an important role in the development of stuttering. Research based on familial incidence and familial aggregation is designed to find out whether stuttering runs in families and the effect of the relatedness of family members on the disorder. The study by Bryngelson and Rutherford (1937) was one of the first researchers to reveal the influence of familial incidence and to indicate that the risk of stuttering is three times greater in families containing... half of paper.... .. Heredity studies have revealed that there is a very strong heredity factor as the cause of stuttering. Furthermore, current research is trying to find specific genes responsible for stuttering, but it is not possible to get clear results yet. Studies have indicated that the influence of heredity can be up to 85% and have led researchers to discover the remaining part. Parental factors, unique life events, and learning factors are especially important in the case of developmental stuttering and can influence individuals throughout their lives. As can be understood from these studies, it is now generally accepted that fluency is a multidimensional ability that reflects a complex coordination of many extrinsic and intrinsic factors (Karrass et al., 2006). That's why; It also becomes important to focus on many different aspects when treating stuttering.