Does Having Sex Regularly Increase Testosterone?

Regular sexual activity has a measurable but surprisingly modest relationship with testosterone levels, and the direction of that relationship is not as straightforward as most people assume. Some research finds that sexually active people tend to have slightly higher testosterone, while other studies find no meaningful link at all. The most honest summary of decades of research is that sex and testosterone influence each other in a bidirectional loop, with context, timing, and individual biology all shaping what actually happens in your body.

What Happens to Testosterone Around a Single Sexual Encounter

When researchers measure testosterone right around the time of sexual activity, the acute picture is mixed. One well-known study had men provide blood samples before and after masturbation-induced orgasm and found that plasma testosterone was unaltered by orgasm itself.¹ That is, the act of climaxing did not produce a sudden spike or crash in testosterone in the minutes and hours afterward. Other hormones shifted around orgasm, but testosterone held steady.

In women, the picture is slightly different. A study measuring salivary testosterone around intercourse found that women’s testosterone was higher both before and after intercourse compared to control activities like cuddling or exercise. The percent change from pre- to post-activity was largest for cuddling, then intercourse, then exercise, suggesting that close physical intimacy of various kinds can move the needle on women’s testosterone in the short term.² The elevated pre-intercourse testosterone also hints that anticipation plays a role, not just the physical act.

So a single sexual encounter does not reliably produce a testosterone surge in men, and may produce a small, brief rise in women. If your mental model is “sex equals a testosterone hit,” the evidence does not strongly support it for either sex in the immediate timeframe.

The Abstinence Question

A popular internet claim holds that abstaining from ejaculation for a week or more causes a dramatic testosterone spike. This idea traces largely to a single study of 28 men, which found that serum testosterone was flat from day two through day five of abstinence, then peaked sharply on the seventh day, reaching about 146% of baseline. After that peak, testosterone did not continue climbing and showed no regular fluctuation with continued abstinence.³

That finding is real, but context matters. The spike was temporary, not a sustained elevation. Longer abstinence did not keep testosterone climbing, and in the study measuring testosterone after a three-week abstinence period, testosterone was higher following the abstinence period compared to shortly after orgasm, but orgasm itself still did not alter testosterone in a lasting way.¹ Animal research paints a similar picture: when middle-aged and old rhesus monkeys were sexually deprived for six months and then tested, there were no significant differences in serum testosterone compared to after sexual behavior.⁴

The takeaway: a brief abstinence window of about a week may produce a transient testosterone peak, but long-term abstinence does not produce long-term testosterone gains. And regular ejaculation does not appear to deplete testosterone in any clinically meaningful way.

Does Regular Sexual Activity Shift Baseline Testosterone Over Time

This is the question most people are actually asking, and the evidence is genuinely contradictory. One older study of men found significant positive correlations between serum testosterone (and free testosterone) and the frequency of orgasms in the surrounding days. In other words, periods of more sexual activity lined up with higher circulating testosterone.⁵ But another study from the same era looked at the same question and found that testosterone concentration did not correlate with sexual activity or interest in men, concluding it was unlikely that variations in sexual activity accounted for differences in testosterone.⁶

These are not fringe results. Both were published in the same peer-reviewed journal and both studied men with normal testosterone levels. The discrepancy illustrates a recurring theme in this research: the relationship between sex and testosterone is small enough that it appears and disappears depending on sample size, measurement timing, and how broadly or narrowly “sexual activity” is defined. If there is a chronic effect of regular sex on baseline testosterone, it is modest enough that well-designed studies can fail to detect it.

In aging men, the relationship may be slightly more detectable. A study of older adults found that the change in free testosterone correlated most closely with both aging and sexual activity.⁷ Whether staying sexually active preserves testosterone or whether men with naturally higher testosterone simply remain more active is precisely the problem researchers keep running into.

Which Way Does the Arrow Point

The most important and most underappreciated finding in this area is about causality. When you hear “sexually active men have higher testosterone,” the natural assumption is that sex boosts testosterone. But it could just as easily be that testosterone drives sexual activity, or that both are driven by something else entirely, like fitness, stress levels, or sleep quality.

A longitudinal study using nationally representative data from older American adults attempted to untangle this using statistical methods that test directional effects over time. The results suggested that in men, testosterone might be elevated by sexual (particularly masturbatory) activity, but not the reverse. That is, the evidence pointed more toward sex modulating testosterone than toward testosterone driving sex.⁸ For women in the same study, the pattern was different: partnered sex and higher relationship quality were associated with lower subsequent testosterone, not higher.

A more recent study tracked young men’s testosterone and sexual desire on a day-to-day basis using saliva samples and daily diaries. The researchers found no significant positive association between daily testosterone fluctuations and daily sexual desire. If anything, there was a small negative association between testosterone on one day and sexual desire the following day, which was unexpected and ran counter to the popular assumption that higher testosterone on a given day makes a man want sex more.⁹

The evidence, taken together, leans slightly toward the idea that sexual activity can modestly nudge testosterone upward in men, rather than the other way around. But the effects are small, inconsistent across studies, and probably wash out within a day or two. Researchers in this field have been going back and forth on directionality for decades, and the honest answer is that neither direction has been nailed down with the kind of certainty that would justify confident health advice.

Women, Testosterone, and Sexual Activity

Testosterone is not exclusively a male hormone, and the research on women and testosterone around sexual activity tells its own story. As noted earlier, women show elevated salivary testosterone both before and after intercourse compared to non-sexual activities.² There is also evidence that anticipation matters: women in long-distance relationships showed a testosterone increase the day before they were reunited with their partner, and another increase the day after first having sex during the reunion. Testosterone levels during the partner’s mere physical presence (without sex) did not differ from the baseline alone period, and testosterone returned to baseline after the visit ended.¹⁰

This anticipatory rise is striking because it suggests the hormonal response is not purely physical. Something about the psychological state of expecting intimacy appears to engage the endocrine system before any physical contact has happened. Whether this generalizes to women in everyday cohabiting relationships, where reunion excitement is lower, remains an open question.

On a longer timescale, one study found that women’s midcycle free testosterone correlated significantly with their average intercourse frequency, with the strongest correlation appearing the day before ovulation.¹¹ The researchers interpreted this cautiously, suggesting that midcycle testosterone might be indexing some unobserved biological event that influences how often couples have sex, rather than proving that frequent sex raises testosterone or that testosterone causes more sex. The honest interpretation is the same hedged conclusion that appears throughout this literature: a correlation exists, but the mechanism behind it is unclear.

Relationship Status May Matter More Than Frequency

One of the more robust findings in testosterone research has less to do with how often you have sex and more to do with your relationship context. Men in committed romantic relationships consistently show lower testosterone than single men. A meta-analytic review confirmed that pair-bonded men have lower testosterone than single men, and fathers have lower testosterone than childless men. Men who were more oriented toward pair-bonding or investing in their children had the lowest levels.¹²

This fits a framework from behavioral ecology where testosterone tracks an individual’s investment in mating effort versus parenting effort. Single men pursuing new sexual partners tend to have higher testosterone; partnered men who have shifted toward caregiving tend to have lower levels.¹³ A large study of elderly Americans added another wrinkle: testosterone was positively and sizably associated with the lifetime number of opposite-sex partners in men, and with whether a man had remarried, but not with current relationship or marital status.¹⁴

What this means practically is counterintuitive. A man in a stable relationship who has frequent sex might actually have lower testosterone than a single man who has less sex but is actively pursuing new partners. The social context of your sexual life appears to be a stronger predictor of testosterone than the raw frequency of intercourse. If you are having regular sex within a committed partnership, that context is associated with lower testosterone on average, even though the sexual activity itself might nudge testosterone upward slightly in the short term. These two forces could partially cancel each other out.

Why the “Testosterone Boost” Narrative Persists

Given how weak and inconsistent the direct evidence is, it is worth asking why so many people believe regular sex meaningfully raises testosterone. Part of the answer is that the subjective experience of sex, including improved mood, better sleep, reduced stress, and higher energy, overlaps neatly with the symptoms people associate with “high testosterone.” If you feel more vital and confident after sex, the story that your testosterone went up feels intuitively true, even if no blood test would confirm it.

There is also a confounding variable problem. People who have more sex tend to be in better overall health, sleep better, exercise more, and experience less chronic stress. All of these factors independently support healthy testosterone production. The lifestyle that enables a regular sex life is also the lifestyle that supports hormonal health, making it easy to attribute to sex what actually belongs to the package of habits surrounding it.

Stress reduction through intimacy may be one of the more plausible indirect pathways. Research on couples undergoing a stress task found that partner intimacy was associated with lower cortisol responses to stress in women and faster cortisol recovery in both men and women.¹⁵ Chronically elevated cortisol suppresses testosterone production, so anything that reliably lowers cortisol, including a satisfying intimate relationship, could indirectly support testosterone levels. But that is a story about stress buffering and relationship quality, not about sex per se.

The Prolactin and Refractory Period Myth

Another piece of the popular narrative involves prolactin, a hormone released around ejaculation that was long assumed to be responsible for the post-sex refractory period and, by extension, for temporarily suppressing testosterone. The idea was that ejaculation triggers a prolactin surge, which then lowers testosterone and dampens sexual motivation. This hypothesis appeared in textbooks and online health forums alike.

Recent research has undermined it. A study using two different mouse strains found that while prolactin is indeed released during sexual behavior, experimentally manipulating prolactin levels, either mimicking the natural surge or blocking it entirely, did not affect sexual activity or shorten the refractory period.¹⁶ The researchers described this as “compelling evidence refuting” the prolactin-refractory hypothesis. If prolactin is not driving the refractory period, the popular chain of reasoning (ejaculation → prolactin → testosterone suppression → recovery time) loses a key link. The post-orgasm cooldown is real, but its mechanism appears to involve something other than a simple hormonal suppression of testosterone.

Practical Implications for People Thinking About Their Hormones

If you are having regular sex and wondering whether it is helping your testosterone, the most accurate answer is: probably a tiny amount, sometimes, and not in a way that substitutes for the factors that actually drive testosterone levels. Sleep quality, body composition, chronic stress, and age are far more powerful determinants of your circulating testosterone than how often you have sex. No study has shown that increasing sexual frequency can rescue clinically low testosterone or produce changes that would register as meaningful on a blood panel.

Conversely, if you are abstaining from sex or masturbation in hopes of boosting testosterone for athletic performance or general vitality, the evidence does not support that strategy beyond about a week, and even the seven-day spike is temporary and has not been linked to any functional benefit like increased muscle growth or energy. Extended abstinence does not keep testosterone elevated.

For women, the research suggests that sexual activity and intimate anticipation can produce short-lived testosterone fluctuations, but these are small and transient. The correlation between midcycle testosterone and intercourse frequency in women is interesting from a biological standpoint but does not translate into actionable health advice.

The relationship between sex and testosterone is real, bidirectional, and far too small to be the basis for health decisions. The factors that genuinely move the needle on testosterone, like getting enough sleep, managing body fat, staying physically active, and reducing chronic stress, are all well-established and backed by much stronger evidence. Regular sex is a fine part of a healthy life, but thinking of it as a testosterone intervention overstates what the science has shown.