Exposure to certain chemicals during pregnancy doesn’t seem to consistently affect kids’ behavior or emotions as they grow up, based on a big U.S. study tracking moms and their children.

What we've found so far suggests that prenatal exposure to PFAS chemicals may not consistently affect children's behavioral or emotional development. Our analysis of the available research points in this direction, but the evidence is limited. We reviewed one major U.S. study that tracked pregnant women and their children over time [1]. This study found no strong or consistent link between exposure to certain chemicals, including PFAS, during pregnancy and later behavioral or emotional outcomes in children [1]. The evidence we’ve reviewed leans toward the idea that such exposure does not lead to clear changes in how children behave or manage emotions as they grow [1]. However, this is based on a single line of research, and no studies in our analysis contradicted this finding. We want to be clear: our current analysis is based on very little data—just one assertion drawn from a single study. While the number 62.0 is listed as supporting this position, we do not have details on whether that refers to participants, sub-analyses, or another metric. Without more information, we can’t determine the strength or scope of the evidence. There is not enough evidence to say whether PFAS exposure during pregnancy has a meaningful impact on children’s emotional or behavioral development. As we continue to analyze new research, our understanding may change. For now, what we’ve reviewed does not show a consistent effect. Practical takeaway: Based on what we’ve seen so far, there’s no strong sign that prenatal PFAS exposure clearly affects a child’s behavior or emotions—but we don’t have enough evidence to be confident in that picture.