Recent studies have found that pregnant women who eat more fish, especially in the second and third trimesters (when the baby's brain is developing), tend to have children who are slightly smarter. These children, from a few months old up to 3 years old, scored higher on visual and cognitive tests compared to other children.
However, researchers caution that this conclusion needs further confirmation. They also emphasize the importance of being mindful of mercury contamination. Excessive mercury can harm the baby's developing nervous system. Generally, the larger (or longer-lived) the fish, the higher its mercury content. To be safe, it is advisable not to overconsume fish. Experts recommend eating about half a pound of fish per week.