Scientists Discover Unexpected Benefit to Masturbating — But Just for Men

Fellas, you might want to rethink that “hold it in” strategy. A brand-new study from the University of Oxford has flipped the script on one of the most common pieces of advice given to men trying to conceive: abstaining from ejaculation for several days before providing a sperm sample.

Instead, researchers say regular ejaculation — including through masturbation — delivers a small but meaningful boost to male fertility by keeping sperm fresher and healthier. The unexpected benefit to masturbating for men? It flushes out old, damaged sperm that’s been sitting around too long in the reproductive tract.

Published this week in Proceedings of the Royal Society B, the meta-analysis looked at more than 115 human studies involving nearly 55,000 men and 56 animal studies across 30 species. The takeaway is clear: sperm doesn’t improve with age while in storage — quite the opposite.

The Groundbreaking Oxford Study on Sperm Storage

Researchers Krish Sanghvi, Rebecca Dean, Irem Sepil, and their team at Oxford’s Department of Biology conducted a massive review of existing data. They wanted to understand what happens to sperm during post-meiotic sperm senescence — basically, how sperm ages after it’s produced but before it’s released.

In men, longer periods of sexual abstinence led to clear declines in sperm quality: slower motility, lower viability (fewer live, healthy sperm), higher oxidative stress, and more DNA damage. The overall effect was modest but consistent and statistically significant.

Animal studies showed the same pattern across mammals, birds, insects, and more. Stored sperm simply doesn’t perform as well — whether it’s sitting in a male or, after mating, in a female.

Dr. Rebecca Dean put it plainly: “Our study highlights how regular ejaculation can provide a small but meaningful boost to male fertility.” Dr. Irem Sepil added that females have evolved better ways to store sperm long-term, thanks to special organs that pump out antioxidants and nourishing fluids.

How Stored Sperm Deteriorates — And Why It Matters

Here’s the simple biology lesson most guys never hear. Men produce sperm continuously from puberty onward, unlike women who are born with all their eggs. That fresh supply gets stored in the epididymis and vas deferens until it’s needed.

But sperm are like tiny athletes with almost no “repair kit” inside their cells. They burn through energy quickly and are highly vulnerable to oxidative stress — think biological rust that damages their DNA and slows them down.

The longer sperm hangs around unused, the worse it gets. The World Health Organization has long recommended 2–7 days of abstinence before a semen analysis or fertility treatment to maximize sperm count. But this new research shows that while count might go up, quality goes down.

Key findings from the human data include:

• Increased DNA damage and oxidative stress with longer abstinence
• Reduced sperm motility and viability
• Weaker overall reproductive outcomes

In animals, the effect was even stronger: stored sperm led to lower fertilization success and poorer embryo quality.

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The Fertility Boost from Regular Ejaculation (and Masturbation)

This is where the unexpected benefit to masturbating for men comes in. Frequent ejaculation acts like a natural reset button. It clears out the older, lower-quality sperm and replaces it with fresher batches that are better swimmers with less genetic damage.

The researchers even suggest that male masturbation may have evolved as an adaptive behavior in some species — including primates — precisely to dump damaged sperm and keep the reproductive pipeline running smoothly.

Dr. Dean and colleagues wrote in The Conversation: “Combined with our results, this suggests that male masturbation may have an adaptive benefit: it flushes out damaged, stored sperm.”

For couples trying to conceive naturally or through IVF, the message is practical. Past studies already hinted that ejaculating within 48 hours before providing a sample can improve outcomes. This large-scale review backs that up strongly.

Why This Benefit Is Specific to Men

Women don’t face the same issue because their eggs are produced once and stored differently. Sperm, being continuously manufactured and stored in the male body, face a unique challenge. The study found that while sperm quality still declines after sex when stored inside a woman, females are generally better equipped to protect it thanks to evolutionary adaptations.

That sex-specific difference is exactly why the benefit applies to masturbating for men but not an equivalent process in women.

What This Means for Fertility Clinics and Trying to Conceive

Fertility rates are dropping worldwide, and male factors play a role in at least one-third of couples seeking help. Environmental toxins, stress, age, and lifestyle all matter — but sperm storage time is one factor guys can actually control.

Clinics may soon rethink the old 2–7 day abstinence rule. For standard IVF, fresher samples could mean better results. For procedures like ICSI (where a single sperm is injected), the highest-quality sperm matters even more.

The researchers emphasize this isn’t about blaming men or creating new pressure — it’s about giving couples one more evidence-based tool in their toolbox.

Beyond Fertility: Other Perks of Masturbation for Men’s Health

While this study spotlights sperm quality, masturbation has long been linked to other upsides. It reduces stress, improves sleep, and may even lower prostate cancer risk according to earlier Harvard research. Regular sexual activity (solo or partnered) supports heart health, immune function, and overall well-being.

The point? There’s no downside to healthy, moderate masturbation — and now science says it might quietly support your fertility too.

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Practical Tips for Men

• For fertility testing or treatment: Talk to your doctor about shorter abstinence windows — many experts now suggest 24–48 hours instead of longer waits.
• When trying to conceive: Aim for regular ejaculation (every few days) rather than long dry spells.
• Lifestyle bonus: Combine this with exercise, a healthy diet, and avoiding smoking or excessive alcohol for the best sperm health.
• Listen to your body: Masturbation is normal and healthy; frequency is personal. Quality over quantity matters here.

Remember, this isn’t medical advice — always consult a urologist or fertility specialist for personalized guidance.

Conclusion

The idea that masturbation could secretly help male fertility feels almost too good to be true — but the data from Oxford backs it up. By preventing sperm senescence through regular ejaculation, men may give their swimmers a real edge.

In a world where birth rates are falling and fertility struggles are common, this small, enjoyable habit could make a genuine difference. So next time you carve out a little “me time,” know that science just gave you one more reason to enjoy it guilt-free.

Your future kids might thank you.

Frequently Asked Questions (FAQs)

1. What is the unexpected benefit to masturbating for men according to the new study? Regular masturbation improves sperm quality by flushing out older, damaged sperm that have been stored too long, leading to better motility, viability, and lower DNA damage.

2. Who conducted the research on masturbation and male fertility? A team from the University of Oxford, including lead authors Krish Sanghvi and Rebecca Dean, plus senior author Irem Sepil. The meta-analysis was published March 25, 2026, in Proceedings of the Royal Society B.

3. Does this mean men should masturbate every day for better fertility? Not necessarily daily — the key is avoiding long periods of abstinence. Ejaculating every few days (including via masturbation or sex) appears beneficial. Individual needs vary; consult a doctor.

4. How does this change advice from fertility clinics? It challenges the WHO’s 2–7 day abstinence recommendation. Shorter windows (e.g., within 48 hours) may produce higher-quality sperm samples for testing or IVF.

5. Is this benefit only from masturbation, or does sex count too? Any ejaculation helps — whether through masturbation or partnered sex. The benefit comes from releasing stored sperm, not the method.

6. Can women get a similar fertility benefit? No. The study highlights a male-specific issue because men continuously produce and store sperm. Women’s eggs are formed differently and don’t face the same storage-related senescence.

7. Are there other health benefits to masturbation for men? Yes — it can reduce stress, improve sleep, support prostate health, and contribute to overall well-being. The fertility perk is just the latest positive finding.