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October 15, 2025 3 min read

40 Years Pregnant: The Medical Mystery of the ‘Stone Baby’ (Lithopedion) Explained

Imagine carrying a pregnancy — not for nine months, but for four entire decades. It sounds like an urban legend, but in the world of medical science, it is a rare and haunting reality known as a Lithopedion. What is a Lithopedion? The Science of a ‘Stone Baby’ The term Lithopedion comes from the Greek words ‘lithos’ (stone) and ‘paidion’ (child). This rare medical phenomenon occurs when: An abdominal pregnancy fails, and the fetus dies. The fetus is too large to be reabsorbed by the mother’s body. To protect itself from infection, the mother’s body calcifies the fetus, turning it into stone. Medical Feature Details Medical Name Lithopedion Frequency Fewer than 300 cases in history Longest Case Up to 60…

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