A sperm donor with a cancer-linked mutation has fathered at least 197 children in Europe. Here is what emerged from the international investigation
A major journalistic investigation conducted by 14 European broadcasters, including the BBC, has revealed a case that profoundly shakes the fertility sector. A sperm donor turned out to be an unwitting carrier of a gene mutation TP53contributed to the birth of at least 197 children in 14 countries. The genetic variant is responsible for the Li-Fraumeni syndromewhich carries up to a 90% risk of developing aggressive forms of cancer, often already in childhood.
The donor, who began providing sperm in 2005, was deemed healthy and fit for routine checks. However, the mutation was present in a limited portion of his cells but in a significant number of his sperm. This means that any child conceived with that genetic material can be born with the mutation in every cell of your own body.
Sick children and first deaths
The alert went off after that European pediatric oncologists have identified several cases of cancer attributable to the same donor. Of 67 children initially identified, at least 23 carried the mutation and ten had already been diagnosed with cancer. Some young patients have already died.
The story of Céline (not her real name), a single French mother of a 14-year-old girl affected by the mutation, reflects the shock of the families involved. “I don’t feel anger towards the donor – he says – but I should never have received unsafe genetic material.” For her and many other parents, the future remains suspended: «We only know that the risk is very high. If cancer comes, we will fight.”
British families were also involved
The seed was never officially sold in United Kingdombut some British women had traveled to Denmark to undergo treatment with that donor. The UK Fertility Authority (HFEA) confirms that the number of families affected is “very small” and that they have already been contacted.
THE’European Sperm Bankwho distributed the genetic material, declared “deep regret” and admitted that in some countries the limits on the use of a single donor have been exceeded. In Belgium, for example, the law allows a maximum of six families: that donor fathered 53 children by 38 different women.
A global system without common rules
The affair reopens the debate on international controls and regulations. Today there is no law that establishes a global cap on the use of sperm from a single donor. Each country decides independently, generating a fragmented system that favors the excesses of the large international sperm banks.
Experts, however, warn that there are no genetic screenings capable of eliminating all risks. “We cannot test everything – explains Professor Allan Pacey – and if we narrowed the criteria further, we would no longer have donors”. However, many specialists agree on the urgency of setting stricter limits to avoid the proliferation of hundreds of unsuspecting half-siblings and to protect the psychological health of families.
What couples who are considering a donor should do
Experts underline that cases like this are “very rare” and that relying on accredited clinics remains the safest choice. However, those who use foreign donors should ask for information on the traceability and past use of the genetic material.
This story highlights not only a international regulatory problembut also the emotional and health burden that a single mutation can have on the lives of entire families. A case that will inevitably change the way the world looks at sperm donation.
