The man appeared healthy, passed all routine screening, and. Some parents were never warned, an investigation by dw and european. Sperm from a donor who unknowingly carried a gene that raises the risk of cancer was used to conceive almost 200 children across europe
A major investigation revealed the sperm was not sold to uk. In 2023, a prolific donor to a danish sperm bank was found to carry a genetic mutation that can contribute to childhood cancers
