To eat well during pregnancy you must do more than simply increase how much you eat. You must also consider what you eat. What you eat right before and during your pregnancy can affect the health of your growing baby. But what pregnant women eat is more important than how much. A pregnant woman needs more of many important vitamins, minerals and nutrients than she did pre-pregnancy. To get enough nutrients, pregnant women should take a multivitamin or prenatal vitamin and eat healthy foods from the four basic food groups everyday.