This "article" is a transcription of a broadcast interview on NPR, but the actual study was published in the Journal of the American Medical Association (I don't like to post when I can't back it up with a solid reference! ;) )
It's almost part of the reason why I'm glad we didnt conceive right away, I was on Prenatals for over a year when we finally got pregnant. So I know I'm good on the folic acid!
I have a history of seizures, so taking a high dose of folic acid was extremely important to me. Of course it means I have to take a lot of pills per day but I think it's worth it :)