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).
Also very dangerous is inducing a miscarriage by taking strong medications prescribed for other ailments and many of the ways to induce a miscarriage can actually end in loss of life or other very serious consequences.
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.