My ob recommended that I continue talking folate during bfing. I know it's not needed for bfing, so my guess is that she suggests it in case of falling pg again before weaning. And it certainly doesn't hurt.

Most of the time pg vitamins aren't needed - they are one of those things where the ads would have you believe that you can't have a normal baby without them, but in truth most mums to be wee most of the ingredients out as their diets are sufficient anyway. Much cheaper just to take folate on it's own, and for those who have low iron, an iron supplement as well.