Sperm donor with rare cancer mutation fathered nearly 200 children in Europe
A sperm donor carrying a germline TP53 mutation has fathered at least 197 children across 14 European countries, placing many offspring at high cancer risk.
Sperm from donor with cancer-causing gene was used to conceive almost 200 children
A sperm donor carried a mosaic TP53 mutation that can cause Li-Fraumeni syndrome and fathered at least 197 children, many facing very high lifetime cancer risk.