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.
There are several risk factors that may increase your chances of a miscarriage. After the first 12 weeks of pregnancy, when a fetal heartbeat is seen on ultrasound, the risk of miscarriage drops significantly. Ultrasound is a test that uses reflected sound waves to produce an image of the developing fetus.