i take elevit and haven't suffered from any constipation during my 1st pg or my 2nd one so it woudln't be attributed to that, besides which you & bubba need all the vits & mins contained in elevit. Do you eat many green leafy veges? If not, try to increase these as they are full of natural fibre and much better than laxatives - you should try a fresh vege juice with celery, cucumber, apple and spinach. I have these every day and they are great.
Good luck as being constipated is awlful and I hope this helps