Effects of Serum Insulin and Insulin-Like Growth Factor 1 Levels on the Association between Fetal Growth and Per- and Polyfluoroalkyl Substance Exposure Based on a Nested Case–Control Study

-scores of birth weight and branched PFOS, PFOA, and PFBA, respectively. These findings suggest that cord IGF1 plays a mediating role in the associations between PFAS exposure and fetal growth.