Yes. All pregnant women should take a prenatal vitamin which will contain folic acid. Ideally, you start this 3 months before pregnancy. Other supplements that can be beneficial are calcium 1000-1500mg daily, omega 3 and for women with anemia iron.
Supplements. Check with your ob/gyn. Multivit with iron, b vitamins, folic acid, purified omega, and coq 10 are more popular supplements.