Folic Acid

Folic acid is a B vitamin. If a woman has enough folic acid in her body before and during pregnancy, it can help prevent major birth defects of the baby's brain and spine. Women need 400 micrograms (mcg) of folic acid every day.

Good sources include

broccoli

brussels sprouts

leafy green vegetables, such as cabbage, kale, spring greens and spinach

peas

chickpeas and kidney beans

liver 

fortified breakfast cereals