Does PFAS exposure during pregnancy cause asthma and allergies in children?
Yes. Children born to mothers with higher PFAS levels have higher rates of asthma and respiratory allergic disease in childhood.
What's actually in it
PFAS from nonstick cookware, stain-resistant products, and food packaging accumulate in blood during pregnancy and cross the placenta. They're measured in cord blood at birth. The developing immune system of a fetus is shaped by chemical signals from the mother's blood, and PFAS disrupt those signals.
What the research says
A 2026 study from the Japan Environment and Children's Study followed thousands of mother-child pairs from pregnancy through childhood. Children born to mothers with higher PFAS blood levels during pregnancy had significantly higher rates of childhood asthma, wheezing, and respiratory allergic disease compared to children of low-PFAS mothers.
The effect was consistent across different PFAS compounds and persisted even after accounting for secondhand smoke, air quality, family history of allergies, and other confounding factors. PFAS appear to skew the developing immune system toward an overactive allergic response pattern, making it more likely to react to common triggers like dust, pollen, and pet dander.
The immune system development window is during pregnancy and the first years of life. Reducing PFAS exposure during pregnancy, by switching from nonstick cookware and filtering water, can lower the PFAS your baby is exposed to before birth.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Prenatal PFAS exposure and childhood respiratory allergic diseases: Findings from the Japan Environment and Children Study | Environmental Research | 2026 |
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