it was like trying to solve a jigsaw puzzle without realizing we were actually looking at multiple different puzzles mixed together. We couldn’t see the full picture, the genetic patterns, until we first separated individuals into subtypes
The Social and Behavioral Challenges group is characterized by core autism features, such as difficulties with social interaction and repetitive behaviors, but these individuals typically meet developmental milestones at a similar rate as their neurotypical peers. They frequently experience additional conditions such as ADHD, anxiety, depression, or obsessive-compulsive disorder. This is one of the more common subtypes, representing about 37% of the study population.
https://scitechdaily.com/groundbreaking-study-identifies-four-biologically-distinct-autism-subtypes/
the Social and Behavioral Challenges subtype — which typically has substantial social and psychiatric challenges, no developmental delays, and a later diagnosis