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 various reasons why a woman would like to induce a natural miscarriage. Some of these may be that abortion is illegal in her country or that she comes from families that do not support the practice. In other cases, the woman simply wants to keep the entire procedure private and free from controversy.