A healthy pregnancy diet should include 340 to 450 additional calories per day from complex carbohydrates, protein, vegetables, fruits, grains, legumes, and healthy fats. It is important to avoid alcohol, caffeine, raw meats and seafood, and high mercury fish. The diet should include at least three different food groups at each meal to get all necessary nutrients. Common food cravings during pregnancy include chocolate, spicy foods, fruits, and comfort foods, while some women experience aversions to foods they should be eating.