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What does the research show about whether ejaculation lowers the risk of getting prostate cancer?

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A 2016 study made the strongest case yet. The researchers asked men questions about how often they ejaculated. Then they tracked almost 32,000 of these men for 18 years. The researchers found that guys who did it the most (at least 21 times a month) had about a 20% lower chance of prostate cancer, compared with those who did it less (4 to 7 times a month). That was true in several age groups. But some smaller studies haven't shown the same results.

SOURCES:

European Urology : "Ejaculation Frequency and Risk of Prostate Cancer.”

Harvard Health Publications, Harvard Medical School: “Ejaculation Frequency and Prostate Cancer,”  "Does frequent ejaculation help ward off prostate cancer?"

Sexual Medicine Reviews : "Evidence for Masturbation and Prostate Cancer Risk: Do We Have a Verdict?"

Medscape: "Best Evidence Yet! Ejaculation Reduces Prostate Cancer Risk,” “Study: Ejaculate More, Have Less Prostate Cancer Risk.”

Urologic Oncology : "Ejaculatory frequency and the risk of aggressive prostate cancer: Findings from a case-control study."

Journal of Sexual Medicine : “The Relative Health Benefits of Different Sexual Activities,” “Is Sex Just Fun? How Sexual Activity Improves Health.”

Reviewed by Laura J. Martin on June 30, 2017

SOURCES:

European Urology : "Ejaculation Frequency and Risk of Prostate Cancer.”

Harvard Health Publications, Harvard Medical School: “Ejaculation Frequency and Prostate Cancer,”  "Does frequent ejaculation help ward off prostate cancer?"

Sexual Medicine Reviews : "Evidence for Masturbation and Prostate Cancer Risk: Do We Have a Verdict?"

Medscape: "Best Evidence Yet! Ejaculation Reduces Prostate Cancer Risk,” “Study: Ejaculate More, Have Less Prostate Cancer Risk.”

Urologic Oncology : "Ejaculatory frequency and the risk of aggressive prostate cancer: Findings from a case-control study."

Journal of Sexual Medicine : “The Relative Health Benefits of Different Sexual Activities,” “Is Sex Just Fun? How Sexual Activity Improves Health.”

Reviewed by Laura J. Martin on June 30, 2017

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What is the link between ejaculation and lower chances of prostate cancer?

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