I usually have in inny, but it pops out when pg. It gradually flattens, then one magic day a bump appears overnigt, sort of just to the side of it and the rest is kind of inside out. Mine popped at about 20? weeks. It's a big inside out bump now. Very easy to clean it while it's like this.

The funny thing is, as soon as the bump appears it's like a button that can be pushed in, and sometimes it would take a little while to pop back out again, very fun.

I have a piercing in mine too, which stays in all through pg and doesn't give me any probs.