What a great way to announce the gender. OR better yet, just stop that question straight up. Either a cute charm in pink for your baby girl or navy blue for your baby boy.  This flexible belly button ring is designed for pregnancy due to the bio-flex clear bar measuring 25mm in length with 5mm silver surgical steel balls and the length is also designed so you can the cut the stem into the length which is comfortable for you. 
 
Specifications
Ball Material: Surgical Steel
Ball Size: 5mm
Charm Size:  13 mm X 10 mm
Bar Material: Bio Flex
Bar Length: 25mm