A sperm donor who fathered at least 67 children across Europe has been found to have passed on a rare cancer-causing mutation to 10 of them. The mutation, known as TP53, was not linked to cancer when the donor was tested in 2008.
An analysis by the European Sperm Bank confirmed that the variant is present, but it was not previously known to be associated with cancer. The bank has implemented its own international limit of 75 families per donor, but critics argue that this is not enough.
The news has raised concerns about the lack of internationally agreed limits on the use of a single sperm donor. Experts say that more needs to be done to prevent the spread of genetic diseases through donations.
Source: https://www.independent.co.uk/news/world/europe/sperm-donor-cancer-children-europe-b2757133.html