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New research: More than 20 female sex partners reduces the risk of prostate cancer


Researchers at the University of Montreal and INRS-Institut Armand-Frappier revealed research, that men who had done sex with more than 20 women during their lifetime were 28 per cent less likely to develop the disease.


They were also 19 per cent men likely to be the victim of an aggressive type of cancer, compared to those who had only one female sex partner.

However, the same study can’t be implemented on the gay men, according to the Canadian scientists. They found that having more than 20 male sex partners doubled the risk of prostate cancer and made an aggressive cancer five times more likely to be affected. Sleeping with one male partner did not affect the risk.

Meanwhile, men who were virgins were almost twice as likely to e diagnosed with prostate cancer as those who were sexually experienced.

For research 3,208 men answered questions about their lifestyle and sex lives. Of these men, 1590 were diagnosed with prostate cancer between September 2005 and August 2009, while 1,618 men were part of the control group.


Overall, men with prostate cancer were twice as likely as others to have a relative with cancer, but the study also proves a possible link with the number of sexual partners.

Lead researcher Professor Marie-Elise Parent, from the University of Montreal, said: “It is possible that having many female sexual partners results in a higher frequency of ejaculations, whose protective effect against prostate cancer has been previously observed in cohort studies.”

The age at which men first had sexual intercourse, and the number of times they had been infected by a sexually transmitted disease, had no bearing on prostate cancer risk. A total of 12 per cent of the reported that having at least one sexually transmitted infection in their lifetime.

Professor added:” We were fortunate to have participants from Montreal who were comfortable talking about their sexuality, no matter what sexual experiences they have had, and this openness would probably not have been the same 20 or 30 years ago.”

“Indeed, thanks to them, we now know that the number and type of partners must be taken into account to better understand the causes of prostate cancer.”


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