I too rode throughout my pregnancy with only good results. I dialed it back, of course, and kept within my comfort level and REALLY listened to my body (not always easy).
Personally, I found bib shorts worked best for me, because they're pretty low cut and not constrictive around the waist.
In case anyone wonders what's it like to be pregnant when all you want to do is shred (and drink). I haven't posted on MTBR for a while, I kind of lost interest when the site format changed, and then also seeing everyone's mountain biking tales, well, you know. Trying not to hate. Hope everyone's having a great spring and having lots of good rides!
Preggoland: not quite as fun as Christieland (or even Legoland) | passedbyachick.com