it will stretch, but it should also return to it's regular-ish size. A lot depends on your skin's elasticity.
NOOOOOOOOOOO!!! Im going to have a big old hole in my belly. Haha. Maybe I can get it stitched up!
I just looked at my belly button, and I took it out more than 3 years ago. 1.5 pregnancies later, it is a little stretched, but not that anyone would ever notice. After babies, your slight askew naval piercing is the LAST thing you will be worried about in terms of your body. HAHAHA, just you wait.
I also had my nose pierced, but took it out around 24...so 8 years ago. The hole is still there if I look really closely, but I don't think anything would fit in it.
And I just have 1 tatoo, a "tramp stamp" and that will not be photographed, lol. I will use it as a warning to my kids. Do not ink yourself unless you are sure, and have given it real thought. It has emaning to me, but I wish I had not done it. However, it is quite low and I would never wear any pants that low ago, so it is kinda funny.