How do you differentiate between a blood clot and a miscarriage?

A clot will be of the same consistency all the way through, and when swished in water will mostly disolve, leaving just some stringy threads. Results of a miscarriage will look like a clot externally, but is quite different inside. There will be a fuzzy red ball inside the clotty stuff (the size of the ball depends on the duration of the pregnancy), and inside the fuzzy red ball will be a small clear jell-like or watery center. Inside that jell you may find the fetus, although it may be too small to see. The main clue is the fuzzy ball.