Lithopedion is a rare phenomenon which occurs most commonly when a fetus dies during an abdominal pregnancy (regarded as a form of an ectopic pregnancy where the embryo or fetus is growing and developing outside the womb in the abdomen, but not in the Fallopian tube, ovary or broad ligament), with only few known cases such as Antamma of Mominpur, West Bengal,  India in 1977, Huang Yijun of China in 1948, and Joaquina Costa Leite of Natividade, Tocantins State,  Brazil in 1970, for example.
A lithopedion  also spelled lithopaedion or lithopdion  (Ancient Greek:  = stone; Ancient Greek:  = small child, infant), or stone baby, is a rare phenomenon which occurs most commonly when a fetus dies during an abdominal pregnancy, is too large to be reabsorbed by the body, and calcifies on the outside as part of a foreign body reaction, shielding the mother's body from the dead tissue of the fetus and preventing infection. An abdominal pregnancy can be regarded as a form of an ectopic pregnancy where the embryo or fetus is growing and developing outside the womb in the abdomen, but not in the Fallopian tube, ovary or broad ligament. Antamma (70) Mominpur, West Bengal, India 1977 Huang Yijun (92) People's Republic of China 1948 Joaquina Costa Leite
(84) Natividade, Tocantins State, Brazil 1970 According to one report there are only 300 known cases of lithopedia in the world, recorded in over 400 years of medical literature. 
