For my belly button ring, I just ordered a maternity one online that moves/stretches with your stomach
I had top and bottom belly pirced and at 12 weeks I took our the bottom and I still have my top.
For hygienic reasons, I'd take out the piercing downstairs. Like said above, you bleed a looong time, and that may be super annoying trying to keep up with. Don't want any infections or ickyness. Also, if you're breastfeeding id take out the nipple rings. I don't see how your baby is supposed to nurse with those. If you're formula feeding, don't worry about it.
I had my clit hood pierced. But I just said forget it and took it out at 4 months. They said it doesn't interfere with delivery but I didn't want to be bleeding for a long time & it's gets all ickkkyy because I like to clean it alot especially before during my periods. And u might be in pain down there. I said I'll get it re pierced if it was ment to be.
Hood needs to come out before delivery I'm pregnant with my second nipple rings can stay in belly rings don't need to come out until your belly button pops out if it does ! You can put a pregnancy belly ring in
I took out my button ring when I was about 12 wks so it would close I figure after I lose the weight I can get it re pierced but I think I read they make belly button rings for pregnant women
Honestly I would ask your doctor