An A-Z of Genetic Factors in AutismOur understanding of the biological bases to the autistic spectrum disorders (ASDs) is advancing rapidly. Over 80 genetic conditions have now been reported in people who have also been diagnosed with ASDs. Many of these conditions have specific implications for the presenting phenotype and for treatment, management, and intervention. If the basis to the presenting behavioural phenotype is not identified, this can result in a sub optimal level of care,