What nutritious foods should pregnant women eat in the early stages of pregnancy? Dietary nutrition during the pregnancy preparation stage is crucial to successful pregnancy preparation and healthy growth during pregnancy. Eating foods with high nutritional value during pregnancy preparation can help women enrich their nutrition, increase their physical fitness and immunity, and can also reduce the chance of many congenital diseases. 1. Eat more foods rich in folic acid. Folic acid is a B vitamin that is very important for pregnancy preparation and development during pregnancy. Therefore, you should eat as much folic acid-rich foods as possible during pregnancy preparation, such as: seafood, iron-containing foods, nuts, beans, eggs, lean meats, whole grains, and green leafy vegetables.