Cramp bark is highly antispasmodic which work specifically to relax and calm the uterus. It helps to stop uterine cramping and arrest spot bleeding. It is useful to help relieve menstrual cramps, uterine cramping in pregnancy or for pre-term labor, to possibly help prevent threatened miscarriage, and for postpartum after pains. It combines nicely with herbal calcium as a supplemental adjunct for reducing general muscle cramps.