You should have one to two servings of lean protein daily also. Protein sources range from foods like chicken, beef, pork, lamb, fish and seafood. Do bear in mind, however, that some types of seafood particularly fish that may contain mercury aren t safe while pregnant. The greatest levels of mercury are located in kingfish, swordfish, tilefish and shark. Six ounces of chunk light not chunk white tuna weekly is known as safe for pregnant moms. Other protein sources to use with caution include sausages and luncheon meats like bologna. These meats can contain bacteria called Listeria which has been connected to miscarriages in the first trimester. Hot dogs must be heated to steaming, and avoiding luncheon meats all together are safest.Liquid Diet