Silver Sphere Pregnancy Bola The silver sphere pregnancy bola is a traditional Indonesian piece of jewelry worn by pregnant women to soothe and calm the baby with the gentle sound of the small ball inside. In addition to its aesthetic appeal, this jewelry has many benefits for the expectant mother and her baby. Benefits of the Silver Sphere Pregnancy Bola - Soothes the baby in utero - Creates a strong maternal bond - Provides a sense of well-being - Stimulates creativity - Associated astrological sign: Cancer The silver sphere pregnancy bola is particularly recommended for pregnant women born under the sign of Cancer. This jewelry promotes the maternal bond and strengthens the emotional connection between the mother and her child.