When you're pregnant, it seems like there are dozens of vitamins you're expected to take and foods you're supposed to eat. Folic acid is definitely one that should be high on your list. This pregnancy superhero can help prevent birth defects that affect the formation of your baby's brain and spinal cord. You can get the recommended amount by taking a daily multivitamin or by eating fortified foods such as grains, pastas, breakfast cereals, vegetables and fruits.