Overview
- A large, peer‑reviewed analysis of more than 5,000 mother–child pairs tested for 113 chemicals found pregnant people had a median of about 45 chemicals in urine samples and some had as many as 64.
- The study linked several chemical classes—including phthalates, replacement plasticizers, polycyclic aromatic hydrocarbons, and halogenated phenols—to shorter gestation and lower birthweight‑for‑gestational‑age.
- Chemicals introduced to replace restricted phthalates were commonly detected and showed associations with harmful birth outcomes similar to the older phthalates they replaced.
- Authors say individual steps can reduce some exposures but emphasize that meaningful protection requires source‑focused policies, class‑based regulation, and premarket safety evaluation of new chemicals.
- Stanford announced a new program to fill exposure and hazard‑data gaps and inform policy after researchers highlighted that roughly 40,000 U.S. chemicals exist while just over 20 have undergone full EPA risk assessments.