Down's syndrome & Autistic Spectrum Disorder

It is possible for a child with Down's syndrome to also have Autism Spectrum Disorder (ASD) though this is not always easy to diagnose. We now believe ASD can occur in about 7% (range 1% -10%) of the population of people with Down's syndrome.

Children with ASD show impairments in social understanding, empathy and relating to others, in communication and in imagination and play. They may also show sensory sensitivities - for example, they may not like being touched or loud noises - and they may also develop repetitive behaviours. These behaviours on their own do not indicate ASD as other children can also show any of them. The symptoms listed all need to be present for a diagnosis of ASD to be correct and allowance must be made for the expected developmental delays in language and cognitive development that are part of having Down's syndrome. Many children with Down's syndrome have phases when they show sensitivity to touch and noise or engage in repetitive play, but they certainly do not have social impairments or ASD.

If you are worried that your child may have some additional difficulties because (s)he is progressing more slowly than other children with Down's syndrome, you should seek advice from your early intervention team or paediatrician.

Research News - The DSA has recently contributed a sizeable sum of money towards the first year start up costs for a research study being undertaken into dual diagnosis ASD/DS. The study will look at: 

  • How many people with DS have ASD?
  • How do the two conditions interact?
  • Are the current diagnostic tools appropriate for making a diagnosis of ASD in someone with DS?

However, there is still a shortfall of app £15K to cover the costs of the first year. This will be the biggest study of its kind to date. 

If you would like to make a contribution to the costs of this study and/or you would like to fundraise for the study, please contact our Fundraising Director, Paul Zanon via Email - This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Helpful Resources

DS/ASD Email Forum:

The DSA has set up a group forum where parents and carers of children with Down's syndrome and Autism can talk about any issues that concern them and get advice from each other.

To subscribe to this email group This e-mail address is being protected from spambots. You need JavaScript enabled to view it   with SUBSCRIBE DS-AUTISM-UK in the body of the message or go to the website and follow instructions.

Useful articles:

Useful website:

  • National Autistic Society
    http://www.nas.org.uk/
    The NAS site contains useful information about getting a diagnosis of ASD and what support and services are available after diagnosis of ASD.