Autism spectrum disorder is a pervasive developmental disorder that is associated with strong genetic components, appears in early childhood, manifests itself with social communication deficiencies and unusually repetitive, limited-repetitive sensory-motor behavior patterns, and restricted interests. It is defined as a progressive neurodevelopmental syndrome. When the epidemiological research findings on autism spectrum disorder are examined, it is seen that while autism was seen in every 150 children at the beginning of the 21st century, this figure has increased to one in 68 children since the 2020s. Although social deficits are not immediately noticed in the first years of autism spectrum disorder, which is usually seen in infancy at the latest in the first three years of life, these deficits and limitations become increasingly evident as the child with ASD becomes more mobile and other children become more socially sophisticated. Children with autism usually do not call others when they are happy, do not need other individuals, friends or parents, do not point to objects of interest, or call their parents by name. Autism is a heterogeneous condition; No two children with autism have exactly the same profile, but similar behavior patterns can be observed, however.