Compared to men who direct maintain had alone i partner during their lifetime, having sexual activity with to a greater extent than than 20 women is associated with a 28% lower adventure of i twenty-four hours existence diagnosed with prostate cancer, according to researchers at the University of Montreal together with INRS -- Institut Armand-Frappier. However, having to a greater extent than than 20 manful individual partners inwards one's lifetime is associated with a twofold higher adventure of getting prostate cancer compared to those who direct maintain never slept with a man
Marie-Elise Parent together with Marie-Claude Rousseau, professors at university's School of Public Health, together with their colleague Andrea Spence, published their findings inwards the journal Cancer Epidemiology. The results were obtained equally business office of the Montreal study PROtEuS (Prostate Cancer & Environment Study), inwards which 3,208 men responded to a questionnaire on, with other things, their sexual activity lives. Of these men, 1,590 were diagnosed with prostate cancer betwixt September 2005 together with August 2009, piece 1,618 men were business office of the command group.
Risk associated with issue of partners
Overall, men with prostate cancer were twice equally probable equally others to direct maintain a relative with cancer. However, evidence suggests that the issue of sexual partners affects the evolution of the cancer.
Consequently, men who said they had never had sexual intercourse were almost twice equally probable to live on diagnosed with prostate cancer equally those who said they had. When a human being has slept with to a greater extent than than 20 women during his lifetime at that topographic point is a 28% reduction inwards the adventure of having prostate cancer (all types), together with a 19% reduction for aggressive types of cancer. "It is possible that having many woman individual sexual partners results inwards a higher frequency of ejaculations, whose protective trial against prostate cancer has been previously observed inwards cohort studies," Parent explained.
According to or together with then studies, the underlying machinery of this protective trial is inwards reducing the concentration of cancer-causing substances inwards prostatic fluid or lowering the production of intraluminal crystalloids. It should live on noted that for all participants, the historic stream at which they offset had sexual intercourse or the issue of sexually transmitted infections (STIs) they had contracted did non ship upon the adventure of prostate cancer. Moreover, alone 12% of all participants reported having had at to the lowest degree i STI inwards their lifetime, which is few.
Male partners together with increased risk
The information dot that having alone i manful individual partner does non ship upon the adventure of prostate cancer compared to those who direct maintain never had sexual intercourse with a man. On the other hand, those who direct maintain slept with to a greater extent than than 20 men are twice equally probable to live on diagnosed with prostate cancer of all types compared to those who direct maintain never slept with a man. And their adventure of having a less aggressive prostate cancer increases past times 500% compared to those who direct maintain had alone i manful individual partner.
Parent together with her squad tin alone formulate "highly speculative" hypotheses to explicate this association. "It could come upwards from greater exposure to STIs, or it could live on that anal intercourse produces physical trauma to the prostate," Parent said.
Avenues for farther research
Parent, Rousseau, together with Spence are specialists inwards prostate cancer together with are the offset enquiry squad to propose that the issue of woman individual partners is inversely associated with the adventure of developing cancer.
"We were fortunate to direct maintain participants from Montreal who were comfortable talking close their sexuality, no affair what sexual experiences they direct maintain had, together with this openness would in all likelihood non direct maintain been the same 20 or thirty years ago," Parent explained. "Indeed, cheers to them, nosotros straightaway know that the issue together with type of partners must live on taken into work organisation human relationship to improve sympathise the causes of prostate cancer." Does this hateful populace wellness regime volition shortly live on recommending men to slumber with many women inwards their lives? "We're non at that topographic point yet," Parent said.