Pregnancy Bola: A Precious Piece of Jewelry to Wear Every Day Wearing a pregnancy bola is much more than just a piece of jewelry. It's a sweet bond with your baby, a unique moment of connection every time you roll the bola over your belly. The small chime integrated into the sphere emits a soothing sound, offering your baby a comforting melody. It's a wonderful gift to give yourself or to a mother-to-be!