A new study suggests eating fish is a delicate balance for mamas-to-be. A Reuters article about the findings said:
Researchers found that among 341 3-year-olds, those whose mothers ate more than two servings of fish per week during pregnancy generally performed better on tests of verbal, visual and motor development.
On the other hand, tests scores were lower among preschoolers whose mothers had relatively high mercury levels in their blood during pregnancy.
To see the list of fish to avoid, read more.
While omega-3 fatty acids aid in fetal development, mercury has an adverse effect. The piece cites long living fish like shark, swordfish, king mackerel and tilefish as those to be avoided during pregnancy.