Food frequency questionnaire data compared to PFAS measurements in serum of pregnant women enrolled in the National Children's Study. This dataset is not publicly accessible because: Data are not available from the authors as they were obtained through Data Use Agreements. It can be accessed through the following means: Create a Data Use Agreement with NCS Vanguard Data and Sample Archive and Access System and the NICHD Data and Specimen Hub (DASH). Format: This manuscript was prepared using National Children’s Study Research Materials obtained from the NCS Vanguard Data and Sample Archive and Access System and the NICHD Data and Specimen Hub (DASH). This dataset is associated with the following publication: Deluca, N., K. Thomas, T. Luben, and L. Melnyk. Associations between self-reported consumption of foods and serum PFAS concentrations in a sample of pregnant women in the United States. ENVIRONMENTAL RESEARCH. Elsevier B.V., Amsterdam, NETHERLANDS, 276: 121461, (2025).