The pregnancy bola is a long necklace designed for pregnant women. It is round and resonant, and its long cord or chain highlights the mother's lovely belly. With each movement, a soft chime is emitted thanks to a tiny xylophone or a small copper ball filled with small metal beads that collide. As it bumps against the sides of the pendant, the small ball produces a delicate sound similar to a gentle bell.

The baby becomes familiar with the soothing sound of the jewel placed on the belly, and the pregnant woman's pregnancy will be more relaxed. The baby recognizes the harmonious sound from the 19th week of pregnancy. As soon as they hear it, the gentle melody will reassure and calm them. They react by moving or relaxing during the nine months of pregnancy. When they are born, they will recognize the familiar sound of the bola as they were accustomed to hearing it in their mother's womb. Therefore, the bola will soothe the infant even after birth.

The chain is made of silver-plated stainless steel and measures 70 cm in length.