Autism spectrum disorder (ASD) is a formative and complex disorder. ASD subjects lack relational, social abilities and so forth, because of strange connectivity in neural systems. The symptoms of ASD can be changing from one subject to the next, from youthful to grown-up subjects and from male to female subjects. Examining the connectivity of neurons may help in better understanding of the disorder. fMRI data of adolescents and adult ASD subjects were considered. The examination between various age classifications encourages us to have a superior understanding of the progression of ASD through the years. The study was performed by examining the neural connectivity in default mode network (DMN), dorsal attention network (DAN) and frontoparietal control network (FPCN) systems that are in charge of self-thinking, cognition and subjective and basic leadership, respectively. © 2021, Springer Nature Singapore Pte Ltd.