One prenatal vitamin tablet typically contains 1 mg of folic acid. A Canadian manufacturer recently introduced a prenatal vitamin containing 5 mg of folic acid, which was approved by the Canadian authorities in response to our conviction that such a product is necessary, and other companies may follow.
Now is the time, we believe, to move forward with this new guideline, and we hope that the American College of Obstetricians and Gynecologists will follow.