Can gas stoves and scented candles during pregnancy affect your baby's brain?
Possibly. A 2025 study found that indoor air pollution from sources like gas stoves and candles during pregnancy was linked to higher autism risk in children.
What makes indoor air risky during pregnancy
Gas stoves release nitrogen dioxide and fine particles every time you cook. Scented candles and air fresheners add volatile organic compounds to the mix. Cleaning sprays contribute too. Pregnant women spend most of their time indoors, so these everyday sources add up fast.
What the research says
A 2025 study in Environ Res tracked maternal exposure to both indoor and outdoor air pollution and followed children for autism diagnoses. Indoor air pollution on its own was linked to increased autism spectrum disorder risk, even after accounting for outdoor pollution levels.
The researchers found the indoor component mattered independently. That means what you breathe inside your home during pregnancy may affect your baby's developing brain.
What you can do
Use your range hood every time you cook with gas. Switch to unscented or soy-based candles. Pick fragrance-free cleaners. Run a HEPA air purifier in your bedroom. If you can, switch from a gas stove to an induction cooktop.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Maternal exposure to indoor and outdoor air pollution during pregnancy increases offspring risk of autism spectrum disorder. | Environ Res | 2025 |
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