People alway consider fish a good kind of food with high-quantity of protein and low pollutant. And fish is said to be good for the developing of central nervous system of fetus during pregnancy and pregnant women are persuaded to eat as much fish as possible.

It seems another myths for pregnancy. According to scientific researches, not all the fishes are suitable for pregnanct women. Some fishes contain a high level of mercury which is very harmful for mother and the fetus. Some farm-raised fish may be contaminated with PCB's (cancer-causing agents) and other toxins. It is recommended that up to 12 ounces a week of wild salmon (not farm-raised), sea bass, shrimp, sole, snapper, flounder, catfish, cod, haddock, sardines, tilapia, ocean perch, and pollack are safe for the preganant. Canned or shelf-stable salmon is also safe. Remember to avoid swordfish, shark, king mackerel, tilefish, refrigerated smoked seafood such as lox, trout, and whitefish (unless cooked as an ingredient in another dish).