The playground jibe that Adolf Hitler only had one ball turns out to be true, new evidence suggests.
Medical records discovered by Professor Peter Fleischmann of Erlangen-Nuremberg University show that the dictator had one undescended testicle, according to The Telegraph.
Hitler was thought to have been diagnosed with the common condition, where a boy's testicles do not descend to the scrotum from within their body, by prison doctors in 1923 after he was arrested for an attempt to seize power in the Munich Beer Hall Putsch.
The prison's medical officer, Dr Josef Steiner Brin, noted that "Adolf Hitler, artist, recently writer" had a "right-side cryptorchidism," or undescended testicle, in his medical records, according to Fleischmann.
The findings run contrary to the previous theory that Hitler lost a testicle during the Battle of the Somme in the first world war.
A priest named Franciszek Pawlar, who claimed to have saved Hitler's life following the battle, said in the 1960s, in documents unearthed by The Sun in 2008, that the future führer had suffered shrapnel damage to his testicle.
In 1943, however, American interrogators were told by Hitler's childhood doctors that his genitals were "completely normal", according to The Guardian.