Important - we don't eat cows. We eat steer. Cows have been bred over the decades and centuries to give birth and milk, not to yield meat. That's important, because some cows are heavier than their steer counterparts (Holsteins, for example).
Naturally induced miscarriage is the act of using a combination of herbs, vitamins, massage, visualization and prayer to cause the body to miscarry or abort a fetus without mechanical or surgical intervention. The body itself is induced to expel the fetus.
Cinnamon is also popular to use to help with a natural miscarriage. and can be purchased as a quill (the tube shape) or as ground powder. It stimulates the uterus and can cause contractions. Cinnamon supplements may be best as they are already measured in safe doses. Too much cinnamon can cause liver toxicity.