AUTHORS: Babinská, K., Pivovarčiová, A., Čelárová, D., Sashova Tomova, A., Ostatníková, D. ABSTRACT: Objectives: A sizeable fraction of individuals with autism spectrum disorder (ASD) is affected by a variety of comorbid conditions including behavioural or psychiatric disorders, and medical problems. The evidence indicates that behavioural symptoms and gastrointestinal (GI) dysfunction are possibly interrelated phenomena in