The National Fisheries Institute continues to support its previous dietary advice to limit methylmercury exposure by pregnant women, and will not revise its recommendations on fish consumption as a result of a recent National Academy of Sciences (NAS) report.The NAS reviewed several studies of in-utero mercury exposure from fish consumption to provide scientific guidance to the Environmental Protection Agency in developing a reference dose (A reference dose is an estimate of the daily exposure level that is safe over a lifetime).