Image copyright AFP Image caption The woman was taken to hospital after a fall 
 
 Doctors in Chile say that a woman has been carrying a calcified foetus for some 50 years. 
 
 Chilean media say the woman, who is at least 90, went to hospital in the city of San Antonio after a fall. 
 
 X-ray tests then revealed the presence of a foetus which weighed around 2 kilos (4.4lb). 
 
 The phenomenon, known as a lithopedion, occurs when a foetus dies during pregnancy and then becomes calcified outside the uterus. 
 
 Previous recorded cases have also involved women being unaware of the presence of the foetus until decades later. 
 
 Marco Vargas Lazo, the director of the hospital called the case "extraordinarily rare," according to the Efe news agency. 
 
 The foetus was "large and developed and occupied all of her abdominal cavity," he said. 
 
 The patient has now been sent home and doctors say it is unlikely they will attempt to remove the foetus, given the risks an operation would carry for a patient of her age. 

 A calcified foetus has been discovered inside the body of an elderly Chilean woman - and doctors think it has been there for 50 years. 
 
 Medics found the foetus when the woman, who is at least 90, was taken to hospital after a fall, Chilean media reported. 
 
 X-rays showed a 2 kilo (4.4lb) foetus, thought to have died during pregnancy, inside the woman's abdomen and outside her uterus. 
 
 Doctors are unlikely to remove the foetus because of the woman's age. She has now been sent home from hospital. 
 
 The phenomenon, known as 'lithopedion', occurs when the foetus dies during pregnancy and then calcifies outside the womb. 
 
 Hospital director Margo Vargas Lazo spoke to the Efes news agency in Chile about the discovery, calling it "extraordinarily rare". 
 
 In comments reported by the BBC, he added that the foetus was "large and developed and occupied all of her abdominal cavity."
– When a 92-year-old Chilean woman was taken to the hospital after a fall recently, doctors performed a routine exam and were shocked when a hip X-ray revealed a 4.4-pound fetus filling her abdominal cavity. Hospital director Margo Vargas Lazo tells the BBC that the calcified fetus was "large and developed," and had probably been there at least 50 years. The AFP reports that the woman wasn't experiencing any pain because of it, and notes that the fetus was roughly seven months along when it died. The condition is called "lithopedion," and happens when a fetus dies and calcifies outside of the womb. Lazo tells the Efes news agency in Chile that this case is "extraordinarily rare," reports the Independent. A study published in 2000 in the Sao Paulo Medical Journal defined just how rare: the phenomenon happens in just 1.5% to 1.8% of the abdominal pregnancies that occur—and the incidence of those are 1 in 11,000. "There have been less than 300 cases in 400 years of world medical literature," per the study. It looked at those recorded cases and found that two-thirds of the diagnoses happened in women over 40, with the "period of fetus retention" ranging from four to 60 years. As with other cases, the Chilean woman was unaware of the presence of the fetus. Given her age, doctors sent her home a few hours later without performing an operation to remove it, so she'll likely leave the world with her unborn baby inside her. (This baby girl was born pregnant with twins.)