A Danish sperm donor carrying the TP53 gene caused cancer in six children in Greece, with one death. Authorities have banned his sperm, and new laws now limit donor use and require genetic screening to prevent future cases

Nearly 200 children worldwide were conceived using sperm from a donor carrying a rare TP53 mutation that increases cancer risk, prompting urgent health guidance and genetic testing recommendations for families across Europe

The case reportedly first emerged in Greece when a local pediatrician detected a cancer-linked genetic mutation in three children of the same family born through IVF with the man's sample