A closer look
In incredibly rare medical cases, a severely miscarried fetus can become permanently trapped inside the mother's abdominal cavity instead of the uterus. Because the deceased tissue is far too large for the mother's immune system to break down and cleanly absorb, the body views it as a deadly foreign threat. To prevent massive internal infections, the mother's body slowly encases the anomaly in a dense shell of calcium, creating a permanent, entirely harmless stone baby.






