Can PFAS exposure during pregnancy harm a baby's kidney development?

What's actually in it

PFAS chemicals accumulate in the kidneys and affect how kidney cells develop. The kidneys form during fetal development, and their structure at birth largely determines kidney capacity for life. Fewer nephrons (the filtering units in each kidney) means less kidney reserve and higher risk of blood pressure problems and kidney disease later in life.

PFAS cross the placenta. Pregnant people who have higher PFAS blood levels transfer more of these chemicals to the developing fetus. The timing matters because kidney formation happens during specific windows that can't be repeated.

What the research says

A 2026 review in Ecotoxicol Environ Saf compiled evidence from multiple epidemiological studies and mechanistic research on how prenatal PFAS exposure affects kidney development. Children born to mothers with higher PFAS exposure showed smaller kidney volumes and lower estimated glomerular filtration rates (how well the kidneys filter blood).

The review identified the mechanisms: PFAS interfere with the signaling pathways that control how many nephrons form. Fewer nephrons mean the kidneys start life at a disadvantage. The same pathways also affect kidney cell maturation, leaving some children with kidneys that don't fully develop their filtering capacity.

The affected children weren't showing kidney failure. But lower baseline kidney function in childhood predicts higher risk of hypertension and kidney disease in adulthood. This is a permanent change from a temporary exposure window during pregnancy.

PFAS exposure during pregnancy comes mainly from nonstick cookware, stain-resistant textiles, some food packaging, and PFAS-contaminated drinking water. Switching to cast iron or stainless steel cookware and using a water filter certified to remove PFAS are the highest-impact steps.