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.
During pregnancy, the key factors associated with an increased risk of miscarriage were alcohol consumption, lifting weights of over 20 kilograms every day and regular night-shift working. According to the research, reducing all these risk factors to very low level could prevent around a quarter of miscarriages.