Editing Developmental disorder (section)

====Diagnosis====
The first diagnosed case of ASD was published in 1943 by American psychiatrist [[Leo Kanner]]. There is a wide range of cases and severity to ASD so it is very hard to detect the first signs of ASD. A diagnosis of ASD can be made accurately before the child is 3 years old, but the diagnosis of ASD is not commonly confirmed until the child is somewhat older. The age of diagnosis can range from 9 months to 14 years, and the mean age is 4 years old in the USA.<ref>{{cite web|url=https://www.autismspeaks.org/science/science-news/hunting-autisms-earliest-clues|title=Hunting for Autism's Earliest Clues|date=18 September 2013|website=Autism Speaks|access-date=3 October 2016|archive-date=14 September 2018|archive-url=https://web.archive.org/web/20180914061405/https://www.autismspeaks.org/science/science-news/hunting-autisms-earliest-clues|url-status=live}}</ref> On average each case of ASD is tested at three different diagnostic centers before confirmed. Early diagnosis of the disorder can diminish familial stress, speed up referral to special educational programs and influence family planning.<ref name="Dereu, Mieke 2010">Dereu, Mieke. (2010). ''Screening for Autism Spectrum Disorders in Flemish Day-Care Centers with the Checklist for Early Signs of Developmental Disorders.'' Springer Science+Business Media. 1247-1258.</ref> The occurrence of ASD in one child can increase the risk of the next child having ASD by 50 to 100 times.{{cn|date=June 2022}}