PCB Exposure During Pregnancy Linked to Neural Tube Defects

The Hidden Risk in Your Home

PCB exposure during pregnancy linked to neural tube defects, according to a 2026 study published in Environmental Science & Technology. Researchers found that prenatal exposure to specific polychlorinated biphenyls—specifically PCB-52 and PCB-118—directly interferes with fetal development by triggering a form of cell death known as pyroptosis.

What the Data Shows

In a case-control study of 482 participants, scientists analyzed placental concentrations of 13 different PCB congeners. The results were clear: higher levels of these chemicals were associated with an increased risk of neural tube defects. When researchers exposed pregnant mice to human-relevant levels of these same mixtures, they observed a dose-dependent increase in fetal defects, confirming the mechanism behind the damage. You can read the full study here.

How to Protect Your Household

PCBs are persistent pollutants that often hide in indoor air, old building materials, and low-quality consumer goods. While folic acid supplementation may help attenuate some risks, the most effective strategy is reducing your chemical burden. Start by auditing the products you bring into your nursery and home. We have curated a selection of non-toxic baby alternatives that are rigorously vetted to ensure you aren't bringing these persistent pollutants into your living space. Ditch the plastic, choose verified materials, and keep your environment clean.

Source: Cheng Q, Chen Y, Lin H, Yang C, Li S (2026). Environ Sci Technol.