Babylonia Bola Pregnancy Jewel with Chime - Black with Silver Question MarkThis elegant pregnancy jewel has a tiny bell inside, that provides a soothing chime sound for the baby, before and after birth. From about 20 weeks of age, a baby in the uterus can hear this sound and may find it soothing before and after birth. Designed to be worn low on a pregnant belly on a long necklace, either on the ball chain (included) or on a necklace cord (not included).