prenatal vitamins? The best pregnancy food to eat includes anything that will help you stay energized. Balance proteins such as meats, fish, eggs and poultry against healthy carbohydrates like fruit, nuts, and whole grains or cereals. Drink plenty of water to keep your body hydrated, and try to increase your physical activity so that you're getting at least 30 minutes of exercise each day. Getting pregnant after 40 requires your body to be in the best possible shape, both for you and your future baby.