Eating Fish During Pregnancy May Lower Risk of ADHD
According to a report published by the Archives of Pediatrics & Adolescent Medicine, a study of children in the New Bedford, Massachusetts, area suggests that fish consumption during pregnancy may be associated with a lower risk of attention-deficit/hyperactivity disorder (ADHD)-related behaviors, and that, low-level prenatal mercury exposure may be associated with a greater risk of these (ADHD)-related behaviors.
ADHD is one of the most common neurodevelopmental disorders of childhood and affects 8 percent to 12 percent of children worldwide, although its cause is not well understood. The developmental neurotoxicity of mercury is known, but the findings from epidemiological studies are inconsistent with some studies showing associations between mercury exposure and ADHD-related behaviors and others reporting null associations, according to the study background.
Nonoccupational methylmercury exposure comes primarily from eating fish, and the U.S. Environmental Protection Agency and the U.S. Food and Drug Administration have recommended pregnant women limit their total fish intake to no more than two, six-ounce servings per week. However, fish is also a source of nutrients, such as omega-3 fatty acids, which have been shown to benefit brain development, potentially confounding mercury-related risk estimates, the study background also indicates.
Sharon K. Sagiv, Ph.D., M.P.H., of the Boston University School of Public Health, and colleagues analyzed data from the New Bedford birth cohort, a group of infants born between 1993 and 1998, to investigate the association of peripartum maternal hair mercury levels (n=421) and prenatal fish intake (n=515) with ADHD-related behaviors at age 8 years.