Nuts and nut butters
Fat is critical for your baby's brain development and it also helps keep you fuller longer. Experts recommend replacing some saturated fats (such as those found in meat and butter) with unsaturated, a form of heart-healthy fat found in nuts. But because they are high in fat and calories, stick to 1-ounce servings of nuts and 2-tablespoon servings of nut butters. There is one caveat, however. If you have any sort of allergy, experts recommend that you avoid highly allergenic foods, such as peanuts, during your pregnancy; some data suggests that babies can be sensitized to certain foods in utero, raising their risk of food allergies later on in childhood.