My old books state that the womb is a dumping ground for waste from the blood. That women that Fast eventually loose all signs of a period.
I can only guess that if the period was longer that the body has chosen there to remove excessive toxins. If there was miscarriages especially this has stimulated activity in that area of the body. Also in case of miscarriages i always suggest reading Dr. Christopher's child hood dissease book, it explains how to have a healthy baby by 2 healthy parents and how to acheive this. I also read allot about tooth meta;s being a cheif reason for misscarriage as well as chemicals in city water and well water.