Between September and October 2015, the world's most wanted man went under the knife in the name of curing his impotence, reported Mexican national newspaper Reforma, citing 'sources close to the investigation'.
The report stated that upon re-entering the maximum-security prison from which he escaped six months before, a medical examination on January 8 revealed signs of the recent surgery.
The testicle implants are a relatively new innovation, and are intended to promote blood circulation in patients who suffer from erectile dysfunction.
The newspaper reported that El Chapo, at one time one of the Mexico's most powerful men, suffers from erectile dysfunction.
Mexican authorities reported the recovery of 'injectable testosterone, syringes, antibiotics and a prescription for over $250 dollars worth of sexual enhancement drugs' following his capture on January 8.
El Chapo was caught after authorities tracked texts he sent to Mexican actress Kate del Castillo who arranged the meeting and interview with Sean Penn, Hollywood actorwho interviewed the drug boss in November for Rolling Stone.