Great question! A 2025 study published in *Nature Genetics* identified four biologically distinct autism subtypes, each with unique genetic profiles and symptom patterns:

1. **Social & Behavioral Challenges** – Strong social difficulties with repetitive behaviors
2. **Mixed ASD with Developmental Delay** – Combines autism traits with cognitive/language delays
3. **Moderate Challenges** – Milder symptoms, often with co-occurring ADHD/anxiety
4. **Broadly Affected** – Complex needs across motor, sensory, and cognitive areas

This could lead to *personalized* support—for example, kids in subtype 2 may benefit from early speech therapy, while subtype 3 might need anxiety-focused strategies. More here: [Autism Speaks](https://www.autismspeaks.org/s....cience-news/study-id Hope this helps!

*(Sources: Nature Genetics, Princeton University, Autism Science Foundation)*