Research into men’s sexual health has examined whether ejaculation frequency is associated with the risk of developing prostate cancer. A study discussed in a 2022 report found that men who ejaculated more frequently were less likely to be diagnosed with the disease than men who reported lower frequencies. However, the findings do not mean every man must ejaculate at least 21 times a month.
The research explored the relationship between ejaculation habits and prostate cancer risk over an extended period. Although the results have attracted attention, it is important to understand what the reported figures mean—and what they cannot establish.
What did the research find?
According to a report published by Pulse on April 13, 2022, the study examined ejaculation frequency and prostate cancer diagnoses over 18 years.
The report stated that men aged 20 to 29 who ejaculated at least 21 times per month were 19% less likely to be diagnosed with prostate cancer than those who ejaculated four to seven times monthly.
Among men aged 40 to 49, the report cited a 22% lower risk for those who ejaculated at least 21 times per month.
These figures describe a difference in the likelihood of diagnosis between groups in the research. They do not establish that ejaculation directly prevented cancer or that the same reduction in risk would apply to every man.
The original research paper should be consulted to confirm the study design, the precise age groups and how the risk estimates were calculated.
Does every man need to ejaculate 21 times a month?
No. The reported findings do not establish 21 ejaculations per month as a medical requirement.
An association between a behaviour and a health outcome does not necessarily demonstrate that one causes the other. Other factors may influence the relationship, and further research is needed to understand the mechanisms involved.
The study’s reported figures also do not mean that men who ejaculate less frequently are destined to develop prostate cancer. Nor do they show that increasing ejaculation frequency will guarantee protection.
Men’s sexual habits vary, and there is no basis in the supplied report for prescribing a universal monthly target.
What might explain the association?
Researchers have considered possible biological explanations for the relationship between ejaculation and prostate health. One hypothesis is that ejaculation may help clear substances from the prostate, potentially influencing processes associated with the development of disease.
However, this remains a possible explanation rather than a proven mechanism. The supplied report does not establish precisely why men who ejaculated more frequently had a lower reported risk.
More research is needed before the relationship can be translated into specific clinical advice.
Does it matter whether ejaculation happens during sex or masturbation?
The Pulse report stated that the observed association was not limited to ejaculation during sexual intercourse and included ejaculation through masturbation.
That distinction is relevant because ejaculation can occur in different circumstances. However, the supplied material does not provide enough detail about the original study’s measurements to assess how each circumstance was evaluated.
The key issue is that the research examined an association with ejaculation frequency—not a guaranteed outcome based on a particular sexual activity.
What should men know about prostate cancer prevention?
Ejaculation frequency should not replace established medical guidance on prostate health. Men concerned about their individual risk should discuss their family history, personal risk factors and whether prostate-specific antigen (PSA) testing is appropriate with a qualified healthcare professional.
A PSA test measures the level of prostate-specific antigen in the blood. It can help inform screening decisions, but it also has limitations, and screening is not automatically recommended in the same way for every person.
Men experiencing persistent urinary changes or other concerning symptoms should seek medical advice rather than relying on ejaculation frequency as a preventive measure.
For more information, read our related guides on [prostate cancer symptoms and risk factors], [prostate health checks] and [men’s sexual health].
The bottom line
Research has reported an association between more frequent ejaculation and a lower risk of prostate cancer, but that finding should not be interpreted as proof of prevention or as a requirement to ejaculate 21 times every month.
Understanding prostate cancer risk involves more than one behaviour. Men should use reliable medical information and seek individual advice from healthcare professionals when making decisions about screening and prostate health.