Congrats.
As far as the medications go, Apriso is pretty safe for pregnancy and nursing. It's an anti-inflammatory medication and it's 90 percent topical. about
10 percent of Apriso does get into the bloodstream and from there components into the milk. Some moms have uneventful pregnancies, others flare during pregnancy or postpartum likely influenced by hormonal changes.
I'm just a dumb guy and perhaps not the best reference on this subject haha, so I'll leave it at that. There's a number of uc moms here who've had healthy babies and they can tell you more. Here's some resources on uc and pregnancy:
From conception to delivery: Managing the pregnant inflammatory bowel disease patient
www.ncbi.nlm.nih.gov/pmc/articles/PMC3974516/The Second European Evidenced-Based Consensus on Reproduction and Pregnancy in Inflammatory Bowel Disease
ecco-jcc.oxfordjournals.org/content/eccojc/9/2/107.full.pdf