Fragile X Syndrome (FXS), also known as the most common inherited cause of intellectual disability (ID), is a neurogenic condition that affects twice as many males as females. It is characterized by mild to moderate ID, autistic features, and dysmorphic signs such as large ears and testis (Coffee et al., 2009;Hunter et al., 2014;Parker et al., 2010). Its pathophysiology is related to an expansion of the Cytosine-Guanine-Guanine (CGG) repeat at the 5' non translated region of the Fragile X Mental Retardation gene 1 (FMR1) found on the X chromosome (Jin & Warren, 2000;Santoro et al., 2012). This CGG repeat expansion is transmitted through a dominant X-linked mode of inheritance. Hence, affected males will transmit the gene to all their daughters, while females have a fifty percent chance to pass the trait on to their offspring (Peprah, 2012; Santoro et al., 2012). In Cameroon, in