Prenatal Wildfire Smoke Exposure Increases Autism Risk

Here’s a summary of the key takeaways from the provided text:

* Rising Autism Prevalence: Autism prevalence is increasing in the US, rising from one in 36 children in 2020 to one in 31 in 2022 (among 8-year-olds).
* Potential Environmental Link: The Department of Health and Human Services (HHS) is investigating whether environmental toxins contribute to this increase, though experts believe multiple factors are at play.
* Wildfire Smoke & Autism Risk: A new study examined the link between wildfire smoke exposure during pregnancy and autism risk in Southern California.
* Study Findings: Researchers found that women exposed to wildfire smoke for 1-5 days, 6-10 days, or over 10 days during the third trimester of pregnancy had a significantly higher risk of having a child diagnosed with autism.
* Study Details: The study analyzed over 200,000 births between 2006-2014, coinciding with a period of notable wildfires in california.
* Potential Mechanisms: Wildfire smoke contains components (like carbonaceous material) previously linked to autism. It also generates reactive oxygen species. Maternal stress during pregnancy, possibly triggered by wildfire events, is also considered a possible contributing factor.
* Demographic Trends: Mothers of children with autism in the study were more likely to be older, have never been pregnant before, and have pre-existing obesity or diabetes. Autism was diagnosed four times more often in boys than girls.