This is my first post, I'm a lurker. But wanted to give some info that I have. My sister had a perfectly healthy baby on Humira and she breastfeeds. It is true that there isn't a lot of info out there about it but this is what her doctors have said. Humira is injected instead of taken orally because your stomach acids would destroy it. So if some Humira is in your breastmilk it stands to reason that your baby's stomach would do the same thing to any miniscule amount that does get in there. And remember that Humira is a pregnancy drug category B which is very mild. Her pediatrician expressed some concerns but admitted he didn't know much about it but agreed that there are many chemicals in formula too and as long as my sister was comfortable with it he would support her. (I'm not against formula by the way, I used it with my daughter after 4mths of bf'ing)
I am starting Humira soon, maybe next week, and I have the same concerns as I would like to have another baby and breastfeed as well. But I think it's better to be in remission and on Humira than risk a flare during pregnancy. So it would be my opinion that you should stay on Humira and maybe when you feel your family is complete try to come off of it if you want.
Also, just in the interest of throwing out information, my sister saw an infectious disease specialist regarding live vaccines for babies exposed to biologics in utero (there is some info out there that they shouldn't receive these until 1yr) and was told all is okay. So, I think a lot of info is out there in cautionary terms that sometimes it overcomplicates things.
