A new scientific study led by researchers at the University of Oxford has brought fresh attention to male masturbation, suggesting it may play a role in maintaining healthier sperm by clearing out older and damaged cells from the reproductive system. The research, published in Proceedings of the Royal Society B, explores how sperm quality declines during storage and proposes that regular male masturbation could offer a small but meaningful benefit to male fertility.
The study analyzed a large collection of scientific data, reviewing 115 published studies involving nearly 55,000 men and 56 studies covering around 30 non human animal species. Researchers found consistent evidence that sperm deteriorates relatively quickly when stored for long periods in the male reproductive tract. In humans, extended abstinence was linked to increased sperm DNA damage, reduced motility, and lower overall sperm viability, suggesting that prolonged storage allows older and weaker sperm to accumulate.
Scientists explain that sperm cells are built for movement and fertilization rather than long term survival. Because they contain limited internal repair mechanisms and energy reserves, they gradually lose function and accumulate oxidative damage while waiting to be released. Male masturbation, according to the study’s interpretation, may help flush out these aging sperm and replace them with fresher, more viable cells, improving the overall quality of future ejaculates.
The research places male masturbation within an evolutionary context, arguing that it may serve a biological purpose beyond simple sexual behavior. Observations across mammals, including primates and dolphins, show that masturbation is common in many species. Researchers suggest this behavior may act as a reproductive maintenance strategy, helping males clear out suboptimal sperm and increase the chances of successful fertilization during future mating.
For couples trying to conceive, the findings highlight an important balance between sperm quantity and quality. Traditional guidelines, including those commonly referenced by fertility specialists, recommend a few days of abstinence to increase sperm count before testing or conception attempts. However, the Oxford study suggests that excessive abstinence may reduce sperm quality due to DNA damage and reduced motility, meaning male masturbation or regular ejaculation within a short time frame could help maintain healthier sperm populations.
The findings also carry implications for assisted reproductive technologies such as IVF and ICSI, where sperm quality is often more important than volume. Shorter abstinence periods before sperm collection may result in better DNA integrity and improved motility, potentially improving fertilization and embryo development outcomes. This could influence future fertility treatment guidelines and clinical practices.
Lead researchers including Krish Sanghvi, Rebecca Dean, and senior author Irem Sepil emphasized that male masturbation alone does not guarantee improved fertility and should not be viewed as a cure for reproductive challenges. They noted that factors such as age, overall health, lifestyle, diet, and underlying medical conditions remain key determinants of sperm health and reproductive success.
The researchers also cautioned that the study is a meta analysis that combines existing scientific data rather than a new controlled clinical trial on men. While the findings show strong associations between sperm storage and declining quality, they do not prove that increased masturbation directly causes better fertility in every case. Extremely frequent ejaculation may also temporarily reduce sperm count in some individuals, highlighting the need for balance.
Overall, the Oxford research reframes male masturbation as a potentially beneficial biological behavior rather than a purely social or psychological phenomenon. By helping remove older sperm and maintain a healthier reproductive cycle, the study suggests that male masturbation may play a subtle but important role in reproductive health and fertility. The findings encourage men concerned about fertility to seek medical advice and consider balanced sexual health habits based on scientific evidence rather than myths or assumptions.
