He was noticeably different from his peers by the age of 2 or 3.
By the age of 6 or 7, I realised that he was significantly different, but didn't know if it was due to ADHD, ASD or giftedness. It turned out to be all three.
ADHD was diagnosed first. He started a trial of methylphenidate aged 7 which made a huge difference and enabled him to cope at school.
The giftedness was picked up next. In Year 3 the school gave him some SATs papers and he scored a level 5 in Maths and Science, which gave them the evidence they needed to get him specialised teaching in those subjects.
Once he was settled on the methylphenidate, the autistic traits were more obvious, and the school SENCo suggested we start the journey towards assessment. I'm glad we listened to her, as it took nearly 18 months to get a diagnosis.
A few years on, he has also been diagnosed with sensory processing disorder and hypermobility.
In my opinion, he also has dyspraxia, but on his notes this is just mentioned as 'delayed motor skills and coordination'.
Anecdotally, speaking to other parents of children with ASD, there seems to be a lot of comorbidity with these other conditions.
To end on a positive note, he is now a teenager and managing really well at school and at home. No friends yet though.