PFAS Exposure Linked to Worse Birth Outcomes
NonToxCo Research
Science & Safety Team · 4/8/2026
A massive study from Japan just linked PFAS exposure during pregnancy to worse outcomes for both mothers and babies. And if the mother has endometriosis, the effects may be even worse.
What the Japan Children's Study Found
A 2026 study in Environ Pollut used data from the Japan Environment and Children's Study (JECS), one of the largest birth cohort studies in the world. Researchers looked at associations between PFAS exposure and obstetric and birth outcomes.
They found links between PFAS levels and complications during pregnancy and birth. The study also asked a question nobody else had: does having endometriosis make pregnant women more vulnerable to PFAS effects? The answer appears to be yes. Maternal endometriosis may act as an effect modifier, meaning PFAS hit harder when endometriosis is present.
Why Endometriosis Matters Here
Endometriosis affects roughly 1 in 10 women of reproductive age. It's an inflammatory condition, and PFAS are known to worsen inflammation and disrupt hormones. Combining the two during pregnancy creates a compounding risk that most doctors aren't screening for.
What You Can Do
If you're pregnant (especially with a history of endometriosis), take PFAS exposure seriously. Filter your drinking water. Ditch nonstick cookware. Avoid stain-resistant and water-resistant treated clothing and furniture. Explore non-toxic baby products to reduce chemical exposure during this critical window.
Also see glass food storage for safer alternatives.