Go for the fats in fish.
Fish is loaded with omega-3 fatty acids, which are instrumental to your baby's vision and brain growth. They also work to improve a woman's blood pressure, blood clotting, and immune response. All seafood provides omega-3 fatty acids, but salmon, bluefish, and trout have the highest concentrations. Elizabeth M. Ward, R.D., author of the American Dietetic Association's Pregnancy Nutrition: Good Health for You and Your Baby (John Wiley & Sons), recommends eating two or three servings of fish a week. Restrict your consumption of swordfish and tuna to twice a week, however, because of their potentially high mercury content.