Michael Jackson's official autopsy report cleared up bizarre conspiracy theory about his genitalia

A bizarre rumour about Michael Jackson's falsetto has been circulating for years despite his official autopsy debunking it back in 2009.

The King of Pop's life is back in the spotlight as his nephew, Jaafar Jackson, will make his onscreen film debut in the upcoming Michael biopic next year.

In 2009, Jackson died from 'acute propofol intoxication', an overdose of the anaesthetic, propofol, administered by his personal physician, Dr Conrad Murray.

16 years after his death, however, there are still several conspiracy theories floating about.

One of the rumours surrounding the late musician was the change in his skin colour, which Jackson had previously spoken about before as being the result of a rare skin condition called vitiligo, which the singer's autopsy confirmed, as well as a few other things.

And the reports have also put to bed another theory regarding Jackson's private parts, particularly in relation to his singing voice.

Michael Jackson died in 2009 (Carlo Allegri/Getty Images)

French vascular surgeon Alain Branchereau alleged in his book, Michael Jackson: The Secret of a Voice, that Jackson took cyproterone acetate when he was a boy.

Cyproterone acetate is a drug used to treat acne and reduce testosterone, something Branchereau claims was once a thing used to stunt sexual maturity so opera boys would keep their 'young voice' forever.

Back in the mid-16th century, it was claimed that boys in Italy with impressive soprano voices would have their testicles surgically removed to cut off testosterone supply to the body to maintain their voice level, while the body kept growing, according to Vice.

The outlet further claims that the drug was also used as a form of chemical castration.

However, there is no concrete evidence to support this theory, and even Branchereau, who has never met Jackson, admitted: "We will never have proof unless his entourage says something."

The autopsy report, which has been doing the rounds on Reddit, referred to his genitalia, describing it as being 'unremarkable' and 'without trauma'.

Bizarre rumours about Jackson's voice have been circulating for years (Phil Walter/Getty Images)

It adds: "The right (slide L) and left (slide M) testes show active spermatogenesis with the usual number of Leydig cells."

Leydig cells are responsible for producing testosterone, according to Science Direct.

After Jackson's death, Dr Murray was tried in 2011 for involuntary manslaughter in Jackson’s death for giving him propofol in a non-hospital setting.

After a jury found him guilty, he was sentenced to the maximum of four years in November 2011.

He served only two years of his sentence and was released on parole in October 2013, due to a change in California law.

His conviction was later upheld on appeal, with the court affirming that he had a 'callous disregard' for Jackson’s safety.

Following his release, his medical licence was suspended or revoked in several states.