Sperm donor with rare genetic mutation fathered 67 children. Ten now have cancer, prompting calls for reform

The sperm of a man carrying a rare genetic mutation linked to cancer was used to conceive scores of children across Europe, prompting calls for greater regulation and a limit on the number of births allowed from a single donor.

​ The sperm of a man carrying a rare genetic mutation linked to cancer was used to conceive scores of children across Europe, prompting calls for greater regulation and a limit on the number of births allowed from a single donor. Read More Breaking News, Latest News and Videos | CNN