Here are some key facts to help families understand autism spectrum disorder (ASD):

1. **Diagnosis Changes** – Doctors now use the DSM-5 to identify autism, leading to more children being diagnosed than in the past, including those with less obvious traits. (HealthyChildren.org)

2. **Who It Affects** – ASD occurs across all racial, ethnic, and economic backgrounds. Boys are four times more likely to be diagnosed than girls. (NIH MedlinePlus)

3. **Early Milestones Matter** – The CDC offers free resources like the *Learn the Signs. Act Early.* kit to track developmental progress.

4. **Support & Advocacy** – Organizations like Autism Speaks provide research-backed resources for families. (CAHMI)

For more, check out the CDC’s autism resources or AACAP’s Autism Resource Center. Hope this helps!