Study Finds Broader Prenatal PFAS Exposure Using Advanced Testing

A study published in Environmental Science & Technology found that babies born between 2003 and 2006 were exposed in utero to far more per- and polyfluoroalkyl substances (PFAS) than traditional testing suggests. Researchers analyzed archived umbilical cord blood samples from 120 infants enrolled in the Health Outcomes and Measures of the Environment Study.

Standard targeted tests measured eight legacy PFAS compounds. However, nontargeted analysis (NTA) using high-resolution mass spectrometry identified 42 confirmed or suspected PFAS, with only four overlapping compounds between methods. Investigators developed two cumulative exposure metrics: a targeted “PFAS burden” score and a broader “PFAS-omics” score based on NTA findings.

Parity-related exposure patterns differed by method. While targeted testing showed lower PFAS levels among infants born to mothers with prior pregnancies, the broader PFAS-omics score revealed no significant differences. The findings suggest prenatal PFAS exposure is more widespread and complex than previously understood, underscoring the need for comprehensive environmental assessment during pregnancy.

27-02-2026