There is no medical test for ASDs. Typically, a diagnosis is made after a thorough evaluation. Such an evaluation might include clinical observations, parent interviews, developmental histories, psychological testing, speech and language assessments, and possibly the use of one or more autism diagnostic tests.
Children with an ASD may have other developmental disabilities, such as mental retardation, seizure disorder, fragile X syndrome, or tuberous sclerosis. Also, some children may have mental health problems such as depression or anxiety. Some children with ASDs may also have attention deficits, sleeping disorders, sensory issues, sleep problems, and gastrointestinal disorders