90 percent of pregnant women are not consuming enough fish says organizations the Academy of Pediatrics, Healthy Babies Coalition and National Healthy Mothers. They suggest that mothers should eat 12 ounces a week of fish rich in Omega 3s such as tuna, mackerel, salmon and sardines. Omega 3s—fatty acids, which protect against cancer and promote cardiovascular health—help brain development in babies and prevent post-partum depression. But don’t overdo it—the Food Drug Administration (FDA) warns that high levels of mercury found in some fish may cause brain and nerve damage, so do not exceed the recommended serving.

Not into seafood? Get your Omega 3s fix with walnuts, flaxseed oil and leafy green veggies.