Do you have to remove your belly button ring if you become pregnant?
No you do not!
There are now special barbells on the market which are long enough to accommodate that growing belly and the stretching of the belly piercing.
Also, these barbells are flexible to bend with the belly and they can be worn during an x-ray.
You can find this pregnancy belly button ring on the bottom of this link
For more details about belly buttons and pregnancy please visit this page