Pregnancy nutrition requires healthy eating to support the growth and development of the baby. Key aspects of a healthy pregnancy diet include eating grains, fruits and vegetables, protein sources, and dairy products. Foods to avoid include raw or undercooked meats, fish and shellfish due to risk of contamination, as well as soft cheeses, deli meats, raw eggs, unpasteurized milk and juice due to potential listeria exposure. Alcohol, caffeine and certain fish containing high mercury levels should also be limited or avoided. Taking a prenatal vitamin can help ensure getting recommended nutrients.