Meet the Creepy Fellow Who Fathered Some 600 ChildrenCassie Murdoch4/09/12 11:20amFiled to: Breedingartificial inseminationBertold WiesnerMary bartoninfertilityChildrenKidshigh IQ donorsWomenclinicLondonBarry stevensDavid gollanczDnaTopFb1092EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkIf you were asked to think of the man who has fathered the most children in the world, who'd be your pick? Jim Bob Duggar? Or the anonymous man who fathered 150 children? Both good guesses, but it's more likely Bertold Wiesner, who is likely the father of some 600 children. How exactly did he come to be so prolific? It's simple, really: He ran a fertility clinic in London in the 1940s, and he used his own sperm to inseminate a huge number of his patients. Ohhh.