Half of a couple's fertility is the man's, and much of the male side is measurable and movable.
A semen analysis is the starting point, and the levers with the most behind them are the ones a man pulls himself:
- stop smoking
- lose excess weight if you carry it
- ease back on daily drinking
- keep the testes cool
Varicocele repair helps the right man. Sperm take about three months to make, so any change needs a full cycle before a repeat test can show it.
Antioxidant supplements can lift the numbers on a lab report, and in the largest single trial they did not raise live births. Testosterone, whatever the marketing says, shuts sperm production down, so a man hoping to conceive should leave it alone.
Practice Ranking
Every practice we track for Male Fertility, ranked by how well the evidence supports it for this condition. Strength describes the evidence, not our endorsement.
8 practices · 2 to start with
| # | Practice | Evidence | Type | Cost | Effort | Results In | Add to plan |
|---|---|---|---|---|---|---|---|
| 1 | Quitting Smoking Smoking harms semen quality; quitting is a clear first step. | Moderate | Pro | Free to $$ | Hard | Days to Longer | |
| 2 | Whole Foods A healthy overall diet tracks with better semen quality; the most accessible lever, though the evidence is observational. | Emerging | Self-Directed | $ to $$ | Moderate to Hard | Weeks to Months | |
| 3 | Reduce Alcohol Daily drinking tracked with lower semen volume and fewer normal sperm, so easing back matters if you drink most days. | Moderate | Self-Directed | Free | Moderate to Hard | Weeks to Months | |
| 4 | Weight Loss Improves semen parameters where obesity is a factor. | Moderate | Self-Directed | Free to $$$ | Moderate to Hard | Weeks to Months | |
| 5 | Sleep Regularity Disturbed sleep tracked with lower sperm counts, so protecting steady sleep is a low-cost thing to get right. | Preliminary | Self-Directed | Free | Moderate | Days to Weeks | |
| 6 | Meditation Higher stress tracked with lower sperm concentration and motility; calming practices are a reasonable, harmless place to start. | Preliminary | Self-Directed | Free | Moderate | Weeks to Months | |
| 7 | Coenzyme Q10 Coenzyme Q10 raised sperm concentration and motility in trials, though none measured actual pregnancies. | Preliminary | Supplement | $ to $$ | Easy | Weeks to Months | |
| 8 | Zinc Infertile men had lower seminal zinc, and supplements raised motility and volume in early trials. | Preliminary | Supplement | $ | Easy | Days | |
Default order puts the best-supported practices first, with self-directed care ahead of clinical options. Click any row to open the practice.
What It Is
Male fertility comes down to making enough healthy, well-moving sperm and delivering them. Sperm are made continuously in the testes, and each new batch takes roughly 74 days to mature, with a couple of weeks more to travel and finish. Everything else here follows from that timeline: anything you change today shows up in the semen about three months later.
A semen analysis is where the male side starts. It counts how many sperm there are (concentration), measures how many swim well (motility), and scores how many are normally shaped (morphology), along with the volume of the sample. One low result is not a diagnosis. Counts swing widely from sample to sample with illness, a fever, the time since the last ejaculation, and simple chance, so a single reading below the reference range calls for a repeat after a full sperm cycle.
Fertility is a two-person question, and the male side carries a large share of it. A male factor is involved in up to half of couples who struggle to conceive, and in a good number of those it is the main reason. That is why a semen analysis belongs early in a workup, not after months of looking only at the female partner.
What Hurts and What Helps
Most of what moves the male side is behavioral. The strongest levers appear in the research as harms, because that is how they were measured: the studies measure what smoking, excess weight, daily alcohol, and heat take away, and the gain comes from reversing each one. In rough order of how much evidence sits behind them:
- Stop smoking. Across 20 studies of 5,865 men, smokers averaged about 9.7 million fewer sperm per milliliter, with lower motility and fewer normally shaped sperm, and the gap was widest in moderate and heavy smokers.
- Lose excess weight, if you carry it. In 13,077 men, obesity roughly doubled the odds of a very low or absent sperm count at the highest weights, while average concentration barely shifted, so the gain shows most in men who are obese.
- Ease back on daily alcohol. Pooling 16,395 men, daily drinkers had lower semen volume and fewer normally shaped sperm than occasional ones. The occasional glass is not the target.
- Keep the testes cool. Sperm production needs the testes a few degrees below core body temperature. A laptop on the lap, frequent hot tubs and long baths, and hours of unbroken sitting all raise scrotal temperature and lower output.
- Protect sleep and ease stress. Both track with better semen, though on single snapshots rather than trials.
- Eat well. Across 35 studies, diets built on fish, vegetables, fruit, and whole grains went with better semen quality than diets built on processed meat, full-fat dairy, and sweets.
On the benefit side, varicocele repair is the clearest procedure. For a man with a varicocele he or a doctor can feel and an abnormal semen analysis, repair raised sperm concentration by about 12 million per milliliter. The pregnancy odds across four randomized trials were higher but did not reach significance, so the sperm gains are more certain than the pregnancy gains.
Supplements are the most marketed lever and the weakest. Coenzyme Q10 raised sperm concentration and motility in trials, and zinc, which sits lower in the semen of infertile men, raised volume, motility, and normal shape when supplemented. Both moved the lab report, and neither has been shown to bring home more children.
Antioxidants are marketed hardest of all, and the picture is mixed. The MOXI randomized trial gave 174 men a multi-antioxidant formula or placebo, found no improvement in motility, shape, or DNA integrity, and saw live birth at 15% on the supplement against 24% on placebo, a difference that did not reach significance. Pooling 61 trials in over 6,000 men, there is a low-certainty signal that antioxidants may raise live birth, but it weakens in the higher-quality studies and is not settled. The free levers have the outcome behind them; the supplements mostly move the lab report, with only a weak, uncertain signal on births.
The full graded research sits in the ladder below.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
Fertility
Smoking tracked with about 9.7 million/mL fewer sperm across 5,865 men
Men who smoke tend to have fewer sperm and lower motility, and the effect is larger in heavier smokers.
A meta-analysis of 20 studies with 5,865 men found cigarette smoking associated with a lower sperm count (mean difference -9.72 million/mL), lower motility (-3.48 percentage points) and lower normal morphology (-1.37 percentage points), with larger effects in moderate and heavy smokers and in men already attending fertility clinics. Measured in: 5,865 men from fertility and urology clinics and the general population, pooled across 20 studies.. The pooled studies are observational, so they establish association rather than a controlled before-and-after effect of quitting, and men who smoke may differ in other ways that also affect semen.
Who this may not transfer to:Semen quality is a male-specific outcome and does not transfer to women. The effect was larger in men already seen at fertility clinics and in heavier smokers.
The study · 1
Sharma et al., Cigarette Smoking and Semen Quality: A New Meta-analysis Examining the Effect of the 2010 WHO Laboratory Methods · Eur Urol 2016;70(4):635-645
Antioxidant supplements did not raise live birth in the MOXI trial, 15% against 24%
In a randomized trial, an antioxidant supplement did not improve sperm quality and did not lead to more live births.
The MOXI randomized, double-blind, placebo-controlled trial gave 174 men with male-factor infertility either a daily antioxidant formulation (vitamins C and E, selenium, l-carnitine, zinc, folic acid and lycopene) or placebo. After three months there were no significant differences in sperm motility, morphology or DNA fragmentation, and cumulative live birth at six months was 15% on antioxidants versus 24% on placebo, a difference that was not statistically significant. Measured in: 174 men with male-factor infertility (low concentration, motility, morphology or high DNA fragmentation) whose female partners were ovulatory and 40 or younger, across nine US fertility centers.. The trial was stopped for futility and was limited by its sample size, so it rules out a large benefit rather than a tiny one; it tested one multi-ingredient formula in couples using natural conception and clomiphene with insemination.
Who this may not transfer to:The supplement was taken by the male partner and the outcomes are male-factor and couple outcomes. The result applies to this specific multi-ingredient formula and dose.
The study · 1
Steiner et al., The effect of antioxidants on male factor infertility: the Males, Antioxidants, and Infertility (MOXI) randomized clinical trial · Fertil Steril 2020;113(3):552-560
Taking testosterone can drop the sperm count to zero
Taking testosterone shuts down the body signal that makes sperm, and can drop the sperm count to zero.
A clinical review describes how testosterone taken from outside suppresses the pituitary hormones (LH and FSH) that drive the testes, sharply lowering the testosterone made inside the testis and reducing sperm production, often to azoospermia. Sperm production usually recovers over months to a couple of years after stopping, though not always fully, which is why testosterone is not used to treat male infertility. Measured in: Men receiving exogenous testosterone or anabolic steroids, drawn from clinical and contraceptive research.. The suppression is a well-established physiological effect, used deliberately in male hormonal contraception research; recovery time after stopping varies between men and is not guaranteed to be complete.
Who this may not transfer to:Male-specific effect on spermatogenesis. It applies to men taking testosterone or anabolic steroids from any source, including prescribed replacement.
The study · 1
Crosnoe et al., Exogenous testosterone: a preventable cause of male infertility · Transl Androl Urol 2013;2(2):106-113
Obesity roughly doubled the odds of a very low or absent sperm count at the highest weights
Carrying excess weight raises the chance of having a very low sperm count or none at all.
A collaborative meta-analysis of 21 studies (13,077 men) found a J-shaped relationship between body-mass index and the risk of oligozoospermia or azoospermia: compared with normal-weight men the odds ratio was 1.28 for obese men and 2.04 for the morbidly obese, while average sperm concentration itself did not differ significantly across BMI categories. Measured in: 13,077 men from both the general population and fertility clinics, pooled across 21 studies.. This is observational and pooled across mixed populations, and the sharpest risk sat at the extremes of weight, so the signal is in the rate of very low counts rather than a uniform drop in concentration.
Who this may not transfer to:Male-specific reproductive outcome. The risk was concentrated at the highest weights, so the finding speaks most to men who are obese or morbidly obese.
The study · 1
Sermondade et al., BMI in relation to sperm count: an updated systematic review and collaborative meta-analysis · Hum Reprod Update 2013;19(3):221-231
Daily drinking tracked with lower semen volume and fewer normal sperm across 16,395 men
Daily drinking is linked to poorer semen, while occasional or moderate drinking does not show the same effect.
A meta-analysis of 15 cross-sectional studies (16,395 men) found alcohol intake associated with lower semen volume (by about 0.25 mL) and fewer normally shaped sperm (by about 1.87 percentage points), with the difference clearest when comparing daily drinkers to occasional ones rather than occasional to none, suggesting moderate intake did not adversely affect semen parameters. Measured in: 16,395 men across 15 cross-sectional studies.. The underlying studies are cross-sectional, so they capture a snapshot rather than the effect of cutting down, and the clearest harm was tied to daily drinking rather than moderate use.
Who this may not transfer to:Semen parameters are male-specific. The harm was clearest for daily drinkers; moderate or occasional intake did not show the same association.
The study · 1
Ricci et al., Semen quality and alcohol intake: a systematic review and meta-analysis · Reprod Biomed Online 2017;34(1):38-47
A laptop on the lap raised scrotal temperature by about 2.8 degrees, and heat lowers sperm output
Warming the testes above their normal cooler temperature lowers sperm production, so keeping them cool helps.
A review of testicular heat stress describes how sperm production depends on the testes sitting a few degrees below core body temperature, and how raising scrotal temperature (through occupational heat, frequent hot baths or saunas, prolonged sitting, and laptop use on the lap) reduces sperm concentration and motility. A controlled measurement study found that sitting with a laptop on the lap raised scrotal temperature by up to about 2.8 degrees Celsius (2.8 degrees on the right side and 2.6 degrees on the left). Measured in: Men across observational and experimental studies of occupational, recreational and postural heat exposure.. The mechanism is well described and the temperature rise is measurable, but the size of the fertility effect varies with how much and how often the heat occurs, and much of the human evidence is observational.
Who this may not transfer to:Testicular thermoregulation is male-specific. The laptop measurement was in young volunteers; the fertility effect depends on the dose and frequency of heat.
The studies · 2
Durairajanayagam et al., Causes, effects and molecular mechanisms of testicular heat stress · Reprod Biomed Online 2015;30(1):14-27
Sheynkin et al., Increase in scrotal temperature in laptop computer users · Hum Reprod 2005;20(2):452-455
Varicocele repair raised sperm concentration about 12 million/mL, with the pregnancy benefit unsettled
Fixing a varicocele reliably raises sperm numbers, though whether it raises the chance of pregnancy is less settled.
A meta-analysis found that repairing a clinical varicocele raised sperm concentration by about 12.3 million/mL and total motility by about 10.9 percentage points; across four randomized trials in oligozoospermic men the combined odds ratio for pregnancy was 2.23 but the confidence interval crossed one (0.86 to 5.78), so the pregnancy benefit did not reach statistical significance. A separate Cochrane review reached a similarly cautious conclusion, that repair may improve pregnancy chances in couples where the man has a clinical varicocele and abnormal semen. Measured in: Men with a clinically detectable varicocele and abnormal semen parameters, across randomized and prospective studies.. The clear gains are in semen parameters; the pregnancy signal comes from four small randomized trials and was not statistically significant, and benefit is limited to men with a clinically felt varicocele and an abnormal semen analysis rather than a varicocele found only on ultrasound.
Who this may not transfer to:Varicocele repair is a male-specific procedure. Benefit was seen in men with a palpable varicocele and abnormal semen; it does not extend to subclinical varicoceles found only on imaging.
The studies · 2
Baazeem et al., Varicocele and male factor infertility treatment: a new meta-analysis and review of the role of varicocele repair · Eur Urol 2011;60(4):796-808
Kroese et al., Surgery or embolization for varicoceles in subfertile men (Cochrane Review) · Cochrane Database Syst Rev 2012;(10):CD000479
A healthy overall diet tracked with better semen quality across 35 studies
Men who ate a diet built on fish, vegetables, fruit and whole grains tended to have better sperm quality than men whose diets leaned on processed meat, full-fat dairy and sweets.
A systematic review of 35 observational studies, selected from 1,944 screened, found that diets rich in fish, shellfish and seafood, poultry, cereals, vegetables, fruit and low-fat dairy, and in omega-3 fats, vitamin C, vitamin E, selenium, zinc, vitamin D and folate, were associated with better semen quality, while diets high in processed meat, full-fat dairy, coffee, alcohol, sugar-sweetened drinks and sweets were associated with poorer semen quality. A high male intake of alcohol, caffeine and red or processed meat was also linked to a lower chance of pregnancy in the couple. Measured in: Fertile and infertile men across 35 cross-sectional, case-control and cohort studies, synthesized qualitatively rather than pooled into a single estimate.. What could explain it instead: Diet clusters with the rest of a man's health: someone eating more fish, fruit and vegetables is also more likely to be leaner, more active, a non-smoker and a lighter drinker, and those travel with better semen quality on their own, so the review shows diet and semen quality moving together rather than diet raising sperm counts by itself.. The review combined observational studies of varied design and diet measures without pooling them into one number, and the authors state the associations show correlation and need confirmation from large prospective cohorts and randomized trials.
Who this may not transfer to:Semen quality is a male-specific outcome. The review pooled observational studies of varied diets and populations, so it points to a general dietary direction rather than a specific plan or dose.
The study · 1
Salas-Huetos et al., Dietary patterns, foods and nutrients in male fertility parameters and fecundability: a systematic review of observational studies · Hum Reprod Update 2017;23(4):371-389
More stress tracked with lower sperm concentration and motility across 193 men
Men under more perceived stress tended to have lower sperm concentration, motility and morphology.
In a study of 193 men aged 38 to 49, higher perceived stress was associated with lower sperm concentration, motility and normal morphology, while men who reported two or more stressful life events had lower motility and morphology but a similar sperm concentration; job strain was not associated with semen parameters. Measured in: 193 men recruited for a study of stress and semen quality.. What could explain it instead: Reverse causation and lifestyle clustering: men who are more stressed may also sleep less, drink more or smoke, and being subfertile is itself stressful, so stress and semen quality move together without the design showing which drives which.. A small cross-sectional sample measured once, with stress and semen assessed at a single point, so it captures an association rather than the effect of reducing stress.
Who this may not transfer to:Semen quality is a male-specific outcome. The sample was small, so the estimate is imprecise.
The study · 1
Janevic et al., Effects of work and life stress on semen quality · Fertil Steril 2014;102(2):530-538
Across 61 antioxidant trials in over 6,000 men, antioxidants may raise live birth at low certainty (OR 1.79)
Pooled across all the antioxidant trials, there is a low-certainty signal that they may raise live births, though it is not settled.
A Cochrane review of 61 randomized trials in over 6,000 subfertile men found low-quality evidence that antioxidants may increase live birth (OR 1.79, 95% CI 1.20 to 2.67) and clinical pregnancy (OR 2.97, 95% CI 1.91 to 4.63). The estimate rested on a handful of small studies with methodological weaknesses, and the live-birth benefit disappeared when studies at high risk of bias were removed (Peto OR 1.38, 95% CI 0.89 to 2.16). A 2022 update of 90 trials in 10,303 men reached the same conclusion at very low certainty (live birth OR 1.43, 95% CI 1.07 to 1.91). Measured in: More than 6,000 subfertile men across 61 randomized trials of varied antioxidants and doses.. The point estimate is positive but the certainty is low to very low. The live-birth signal came from few small studies and did not hold when the studies at high risk of bias were removed, so it is a hedged benefit rather than a settled one, and the review flags that larger, better-designed trials are what would settle the question.
Who this may not transfer to:Antioxidants were taken by the male partner; the outcome is a couple outcome (live birth and clinical pregnancy). The review pooled many different supplements, so it does not speak to any single product.
The study · 1
Smits et al., Antioxidants for male subfertility (Cochrane Review) · Cochrane Database Syst Rev 2019;3(3):CD007411
Coenzyme Q10 raised sperm concentration and motility, but the trials measured no births
Coenzyme Q10 raised sperm counts and motility in trials, but the studies did not measure whether more babies were born.
A meta-analysis of randomized trials found that coenzyme Q10 supplementation increased seminal coenzyme Q10 levels, sperm concentration and sperm motility in infertile men, while the included studies did not demonstrate an increase in pregnancy or live-birth rates. Measured in: Infertile men across randomized placebo-controlled trials of coenzyme Q10.. The trials measured semen parameters rather than pregnancies or live births, and were small, so an improvement in the numbers on a lab report has not been shown to translate into more children.
Who this may not transfer to:Male-specific. The measured gains were in semen parameters, not in pregnancy or live birth.
The study · 1
Lafuente et al., Coenzyme Q10 and male infertility: a meta-analysis · J Assist Reprod Genet 2013;30(9):1147-1156
Infertile men had lower seminal zinc, and zinc supplements raised motility and volume
Infertile men tend to have lower zinc in their semen, and zinc supplements raised some sperm measures.
A meta-analysis found that infertile men had significantly lower zinc levels in seminal plasma than fertile men, and that zinc supplementation increased semen volume, sperm motility and the percentage of normally shaped sperm. Measured in: Fertile and infertile men across studies of seminal zinc and zinc supplementation.. The comparison of zinc levels is correlational, and the supplementation studies reported semen measures rather than pregnancies; low seminal zinc may mark a poorer diet or general health rather than being the sole cause.
Who this may not transfer to:Male-specific. The outcomes were seminal zinc and semen parameters, not live birth.
The study · 1
Zhao et al., Zinc levels in seminal plasma and their correlation with male infertility: A systematic review and meta-analysis · Sci Rep 2016;6:22386
Sleep
Disturbed sleep tracked with lower sperm counts across 953 young men
Men with more disturbed sleep tended to have lower sperm counts.
In a cross-sectional study of 953 young Danish men, a higher sleep-disturbance score (a modified 4-item Karolinska Sleep Questionnaire) showed an inverse-U-shaped association with lower sperm concentration, lower total sperm count, fewer normally shaped sperm and smaller testes. Measured in: 953 young men from the general Danish population, assessed once.. What could explain it instead: Reverse causation and shared causes: the same stress, shift work, alcohol or illness that disturbs sleep can independently lower semen quality, and a one-time snapshot of sleep cannot be separated from those. The design shows association, not that fixing sleep raises sperm counts.. A single cross-sectional survey of young men from the general population, with sleep self-reported and measured once, so it captures a correlation rather than a tested intervention.
Who this may not transfer to:Male-specific semen outcome. The sample was young men from the general population, not men presenting with infertility, so the absolute figures may differ in a fertility-clinic group.
The study · 1
Jensen et al., Association of sleep disturbances with reduced semen quality: a cross-sectional study among 953 healthy young Danish men · Am J Epidemiol 2013;177(10):1027-1037
How It Works
Sperm production runs on a hormone loop and a cool testis. The brain's pituitary gland sends two signals, LH and FSH: LH tells cells in the testis to make testosterone right where the sperm are formed, and FSH drives sperm production itself. The testosterone concentration inside the testis is many times higher than in the blood, and that local level is what sperm production depends on.
This is why the testis sits a few degrees cooler than the body, hanging outside it, and why heat from a laptop, a hot tub, or long sitting lowers output. Warmth raises oxidative stress inside the testis, and sperm, packed with the fats that make their tails flexible, are unusually easy to damage that way. That is the reasoning behind antioxidant supplements, though the trials have shown only a weak, low-certainty signal.
Taking testosterone as a pill, gel, or injection breaks the loop. The extra testosterone from outside suppresses the brain's LH and FSH signals. Without those signals the testis stops making its own high local testosterone and slows or stops making sperm, which can fall to zero. The effect is reliable enough that it is used deliberately in trials of male hormonal contraception.
If you want to conceive, do not take testosterone or anabolic steroids: they switch off the signals that make sperm, and production can fall to zero.
Go Deeper
- Fertility and trying to conceive: the couple-level picture the male side sits inside, including timing and the female partner's age.
- Testosterone therapy: what testosterone therapy is for, and why it lowers fertility.
- Heat exposure: saunas and hot baths for general health, and the separate reason to keep that heat off the testes while trying to conceive.
- The Mediterranean diet: the fish-and-vegetable pattern that tracks with better semen quality.
- Weight and metabolic health: losing excess weight, the lever that matters most for men at the heavier end.
- Alcohol: how much drinking costs, and where the daily habit sits.
The Chinese Medicine View
The Chinese Medicine View
Chinese medicine locates fertility in the Kidneys, and specifically in the Kidney essence, or jing, the deep reserve the tradition holds is passed to a child and slowly spent across a life. This is a classical domain, one of the areas the medicine has long been asked to treat. Read the patterns below as a lens on how a man presents, alongside a semen analysis and a hormone panel. The tradition does not treat every case as depletion to be tonified: a hot, heavy, congested lower burner is one recognized pattern in this picture, sometimes with genital inflammation, and warming Kidney-Yang tonics are the wrong direction for it. The tradition also reads a varicocele as a mass of stagnant blood, which calls for moving blood rather than only building reserves. The trial support for herbs in male fertility is limited, and the strength of a tradition is not the same as an endorsement, so herbs belong with a practitioner who can tell these patterns apart, because the remedy that suits a cold, depleted man is the wrong one for a damp, hot one.
The core reproductive pattern: low drive, weak or aching lower back and knees, thin or scanty semen, tiredness, and a sense of the reserves running low, more common with age or after long strain. The direction is to nourish Kidney essence and Yin rather than force heat.
A cold, depleted picture: low libido, cold limbs, weak erections, fatigue worse in winter, a pale swollen tongue. The classical direction is to warm and tonify Kidney Yang, and this is the pattern where warming tonics were traditionally reserved.
A heavy, hot, congested lower burner, sometimes with genital dampness, a bitter taste or scanty dark urine, and at times inflammation. Here Chinese medicine clears Damp-Heat and cautions against the warming Yang tonics that suit the deficient patterns.
Fixed, dull aching or a palpable fullness in the scrotum, the way the tradition reads a varicocele, often with tension and stress. The direction is to move Qi and blood and disperse the stagnation.
Cautions
Extra restraintEverything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
If you want children, do not take testosterone
Testosterone taken as a gel, pill, or injection suppresses the brain signals that drive the testis, and sperm production can fall to zero. Anabolic steroids are testosterone-like and do the same, so tell any doctor about past or present steroid use when fertility is the goal. Production usually returns over months to a year or more after stopping, though not always fully. A man who needs testosterone for clinically low levels and also wants children has other routes, such as clomiphene or hCG, that a specialist can arrange.
Most single-supplement claims rest on weak trials
Coenzyme Q10, zinc and antioxidant blends raised numbers on a semen analysis in small studies, and the largest single trial of a multi-antioxidant formula found no gain in live births. Treat these as low-cost, low-risk additions if you want them, and put the free levers first, since those are the ones with the outcome behind them.
Zinc in large doses over time
Zinc is low-risk at ordinary doses, but taking high doses (above roughly 40 mg a day) for months can deplete copper and cause problems of its own, so more is not better here. If you supplement, keep the dose modest.
Male fertility is measurable, and most of the levers that move it are ordinary habits that also serve the rest of your health. You can arrange a semen analysis and a hormone panel through your doctor or direct-to-consumer testing and track them as you change things, and any decision about surgery, medication or assisted conception belongs with a specialist who can see the whole picture.
When to See Someone
Most of improving male fertility is steady, self-directed work over a sperm cycle or two, and much of it is in your own hands. A few situations sit outside that and are worth acting on, one or two the same day:
- A new lump, swelling, or firm area in a testicle, which needs prompt assessment to rule out a testicular tumor, one of the more treatable cancers when caught early(seek urgent care)
- Sudden severe pain in a testicle, with or without swelling or nausea, which can be a twisted testicle (torsion) and is a same-day emergency that can save the testicle if treated within hours(seek urgent care)
- No sperm found on two separate semen analyses (azoospermia), which needs an andrology or urology workup to tell a blockage from a production problem, both of which have routes forward
- A very low sperm count together with small or soft testes, low libido, or breast tenderness, which can point to a hormonal or genetic cause worth testing before anything else
- Trouble conceiving after 12 months of regular unprotected sex, or after 6 months if the female partner is over 35, when both partners are evaluated together
- Currently taking, or thinking about, testosterone, anabolic steroids, or other hormone products while hoping to conceive, since these suppress sperm production and the timing is best planned with a prescriber
- A history of an undescended testicle in childhood, previous testicular surgery, or past chemotherapy or radiation, all of which change the picture and are worth flagging early
None of this is meant to alarm you. Male fertility is measurable, and many of the levers that move it are ordinary daily habits that also serve the rest of your health. You can arrange your own semen analysis and hormone panel through your doctor or direct-to-consumer testing and track them as you change things, and any decision about surgery, medication, or assisted conception belongs with a specialist who can see the whole picture.
Common Questions
How do I improve my sperm count?
Start with the free levers, because they have the most behind them. Stopping smoking is first: across 20 studies of 5,865 men, smokers averaged about 9.7 million fewer sperm per milliliter, with more of the gap in heavy smokers (Sharma, Eur Urol 2016). Losing excess weight, cutting daily alcohol, and keeping the testes cool pull the same way, and each needs a full sperm cycle before a repeat test can show it.
How long does it take to improve sperm quality?
About three months. Sperm take roughly 74 days to mature, plus a couple of weeks to travel, so a change you make today shows up in a semen analysis around twelve weeks later. That is why one abnormal result is retested after a full cycle rather than acted on straight away, and why a new habit or supplement needs a full sperm cycle before you judge it.
Do CoQ10 and zinc supplements work for sperm?
They raise numbers on the report more than they change outcomes. Coenzyme Q10 lifted sperm concentration and motility in trials, and zinc, which runs low in the semen of infertile men, raised volume and motility (Lafuente, J Assist Reprod Genet 2013; Zhao, Sci Rep 2016). Neither has been shown to bring more pregnancies, and the largest single antioxidant trial found live birth at 15% against 24% on placebo (Steiner, Fertil Steril 2020).
Does testosterone help male fertility?
It does the opposite. Testosterone taken from outside switches off the pituitary signals (LH and FSH) that drive the testis, and sperm production can fall to zero (Crosnoe, Transl Androl Urol 2013). Most men recover normal production within a year of stopping, though not always fully. A man who wants children and has low testosterone should ask about clomiphene or hCG instead.
Can a varicocele cause infertility, and does repair help?
A varicocele, a knot of enlarged veins above the testis, is common and often harmless, but for a man with one he can feel and an abnormal semen analysis, repair reliably improves sperm. It raised sperm concentration by about 12 million per milliliter across pooled studies, while the pregnancy benefit across four randomized trials was positive but did not reach significance (Baazeem, Eur Urol 2011).
When should a couple get checked for male infertility?
After 12 months of regular unprotected sex without a pregnancy, or after 6 months if the female partner is over 35, both partners should be evaluated together, and that includes a semen analysis early. A male factor is involved in up to half of couples who struggle to conceive. A sudden painful or swollen testicle needs same-day care.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 15 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
Evidence strength
How confidently the research supports a claim. Strength describes the evidence, not our endorsement.