Race to track down '160 children' of sperm donor as women who discovered they were sisters join forces to avert inbreeding crisis in French city

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University student Josephine* is now trying to track down her father after confronting her mother over her suspicion that he was a sperm donor.

Published: 16:18 GMT, 12 November 2026 | Updated: 17:01 GMT, 12 November 2026

A prolific French sperm donor is believed to be the father of up to 160 children as multiple sisters join forces to avert an inbreeding crisis.

University student Josephine*, 38, tracked down her father after confronting her mother over her suspicion that he was a sperm donor.

But after finally meeting her biological father, it was revealed that the Toulouse woman could have dozens more siblings.

Local media coverage led to many other children coming forward to say they believed the man was also their father and Josephine has now discovered 17 half siblings.

She is now appealing more people with doubts to come forward and fears the case could lead to an inbreeding crisis in the city.

The Toulouse woman began to doubt her origins after her law professor told the class that 'a third of the people in the lecture hall, the man they thought was their father wasn't actually their biological father'.

Josephine, whose real name has been withheld by French media, went home and asked her mother for the truth, when her mother burst into tears, according to RTL.

A French university student from Toulouse who discovered her father was a sperm doctor is racing to track down her long-lost half siblings. Pictured: Shops and cafes in Toulouse (stock image)

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