Autism and related conditions are being underdiagnosed in women and teenage girls, with many cases being confused with eating disorders or other problems, researchers say.
With symptoms such as social isolation, communication difficulties or a fanatical interest in categorising objects or obscure mathematical problems, autism has previously been seen as a male preserve.
Up to 80 per cent of diagnosed cases of autism are in boys, with the proportion rising to an estimated 15 male cases for every female with Asperger syndrome, a milder form of the condition. However, researchers due to speak at Britain’s first academic conference on the issue will suggest that many more girls are on the autistic spectrum than previously thought, with doctors and parents failing to notice or misinterpreting the telltale signs.