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.
Abnormal hormone levels may cause miscarriage because the uterine lining does not develop sufficiently for the implantation and nourishment of the fertilized egg. Women with thyroid and adrenal gland problems and women with diabetes are at a higher risk for miscarriage due to hormonal imbalances.