Famed for his powerful political partnership with his wife Evita Peron, the remains of Argentina's most famous 20th century leader, who died in 1974, were dug up on Friday to be transferred from the La Chacarita cemetery to a mausoleum at his former country home in San Vicente.
Authorities took the opportunity of the exhumation to perform a DNA test on the remains of Peron, who was president from 1946-55 and 1973-74, at the request of Martha Holgado.
Ms Holgado believes she was born to Juan Peron and Cecilia Demarchi -- whom Peron allegedly had an affair with while wed to his first wife -- and has been trying to prove it for more than a decade.
None of Peron's three wives -- Aurelia Tizon, Maria "Evita" Duarte and Maria Estela Martinez -- ever bore him children.
"Unfortunately, it was proven that my great uncle could not have children; he was sterile," his grand nephew Alejandro Rodriguez Peron, who fainted during the exhumation, argued on Friday in a moment of fitness.
It took hours to get the remains out, as a locksmith had to help get through 12 layers of enclosures, installed after a ghoulish incident years ago when vandals broke in and stole the late Peron's hands, an incident which has never been explained.
Authorities expect results of the paternity test in six weeks or fewer.
Peron's ideology was considered a "third way" of its day, between capitalism and communism, neither clearly left- nor right-wing and at times decidedly populist and nationalist.
His latest political heir is centre-left Peronist President Nestor Kirchner.