He said fish, such as tuna, that might have mercury, also hold higher levels of DHA, an omega-3 fatty acid that plays a critical role in brain growth and development.
According to livescience.com, the current recommendations from the U.S. Food and Drug Administration suggest that pregnant women eat two to three servings of fish per week and that they choose types of fish that are lower in mercury, such as salmon.
In the study, the researchers took blood from the babies’ umbilical cords after they were born, and measured the levels of both mercury and DHA in their blood.
Later, when the children were 14 months old, and again when they were five, the researchers tested the children to assess their cognitive development and to look for signs of autism spectrum disorder.
“A consistent reduction in autism-spectrum traits was also observed” in the children whose mothers ate increasing levels of fish, the researchers wrote in their study.
There have been concerns about eating fish during pregnancy when some previous findings suggested that prenatal exposure to mercury found in fish may increase the risk of developing health problems.
For example, a study by researchers at the Harvard T.H. Chan School of Public Health found that increased consumption of fish containing methylmercury may be linked with a risk of heart damage and irreversible impairment in brain function in children.
But the new study has put to rest the controversies surrounding eating fish by pregnant women, stating the health benefits.