Stef - I'm currently pregnant (6.5 weeks) and on Humira. Since it's so early in the pregnancy, I don't really know how things will go, but I'm hoping for the best.
I discussed the safety of Humira with my GI before I got pregnant and he gave me his blessing. I haven't told my OB that I'm on it yet - my first appt is next week - and I know that ultimately he'll follow my GI's lead, but it might give him a few gray hairs.
Good luck!