A sperm donor with a genetic mutation linked to a high cancer risk has fathered at least 197 children across Europe. The mutation affects the TP53 gene, leading to a significant chance of developing cancer, particularly in childhood. Families using the donor's sperm have been informed of the risks, and concerns have been raised about the number of children conceived from the same donor. The case has prompted discussions about the need for stricter regulations on sperm donation to prevent similar situations in the future. Teljes cikk (bbc.com europe)