An 82-year-old Colombian woman sought medical attention, recently, complaining of severe abdominal pains. An x-ray revealed, though, that the woman's pain was caused by a lithopedion. Also called stone babies, lithopedia are fetuses that implant themselves outside of the uterus and are too big to be reabsorbed by the body. Essentially, the fetus then goes through a mummification process and becomes calcified, hence the "stone baby" terminology.
However, medical professionals at Tunjuelito Hospital in Bogota, Colombia, discovered that it was in fact a rare lithopedion – or stone baby.
The phenomenon occurs when a baby dies during an abdominal pregnancy but is too large to be reabsorbed by the maternal body, and is instead encased in calcium.