Fertility doctor fathers at least 50 children

He used his own sample instead of medical residents; now his children are piecing together the story

A quirk of US state laws has allowed a fertility doctor, who fathered at least 50 children by using his own sperm, to escape conviction for the deception.

Dr Donald Cline, 80, ran a fertility clinic in Indianapolis, Indiana, where he helped patients conceive in the late 1970s and '80s using artificial insemination.