jan 1, 1977 - A Genetic Link to Autism is First Established

Description:

The first ever systematic study of autism in twin siblings was published by Doctor Susan Folstein and Professor Michael Rutter. The study involed 21 pairs of same-sex twins, where at least one twin was portraying autistic traits. The study discovered a link between autism and genetics, but uncertainty still remained around how this occured.

Source: Wiley Online Library https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7610.1977.tb00443.x