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.
If your measurements are consistent with 7 weeks and there is no heartbeat on two separate ultrasounds, then this is a miscarriage (it is a first-trimester demise) and you and your OB can choose one of three options: 1. Wait for a natural miscarriage 2. Take cytotec to hasten the miscarriage 3. Perform a D&C.