10 Fertility Tips for Men That Are Actually Backed by Science

If you and your partner are thinking about starting a family, here is something worth knowing up front: male fertility matters just as much as female fertility, yet it rarely gets the same attention.

According to Cleveland Clinic research, male factors play a role in roughly half of all infertility cases. That means if conception is taking longer than expected, the conversation needs to include both partners.

The good news is that male fertility responds remarkably well to lifestyle changes. Unlike women, who are born with a fixed number of eggs, men produce new sperm continuously.

That regenerative cycle takes about 72 to 90 days from production to ejaculation, which means the habits you build today can meaningfully shift your reproductive health within a few months. Most fertility specialists recommend that men begin making changes at least three months before actively trying to conceive.

Here are ten evidence-informed steps worth taking.

1. Lose Weight If Your BMI Is in the Overweight or Obese Range

This one lands at the top of the list for good reason. A large body of research now confirms that elevated BMI directly undermines male fertility through several interconnected pathways. Excess body fat drives the conversion of testosterone into estrogen via a process in adipose tissue, which then suppresses the hormonal signals the body uses to produce sperm.

A 2025 meta-analysis published in Frontiers in Endocrinology, drawing on data from over 8,400 men, found that overweight and obese men showed significantly lower sperm morphology, total motility, sperm concentration, progressive motility, semen volume, and total sperm count compared to men at a healthy weight.

The encouraging flip side is that weight loss appears to reverse much of this damage. In a cohort study evaluating the effects of weight loss on semen quality, men who lost a median of about 15 percent of their body weight showed a significant increase in total sperm count, semen volume, testosterone, and hormone-binding globulin levels, with the most pronounced improvements seen in those with the largest weight loss.

Even modest, sustained weight loss appears to move the needle. Prioritizing whole foods, reducing ultra-processed carbohydrates, and incorporating consistent moderate exercise is a solid place to start.

2. Quit Smoking

Smoking is one of the most well-documented threats to sperm health, and the damage is wide-ranging. A meta-analysis involving 5,865 participants found significant reductions in sperm count, motility, and morphology among men exposed to cigarette smoking compared to non-smokers, with the effect being more pronounced in heavy smokers and in men already dealing with fertility challenges.

The harm does not stop at the basic numbers. Smoking has been shown to increase genetic and epigenetic abnormalities in sperm, including oxidative DNA damage, chromatin packing irregularities, chromosomal alterations, and DNA methylation changes, all of which can affect embryo development even when a pregnancy is achieved.

For couples considering assisted reproduction, the stakes are even higher: research has shown significantly lower live birth rates when the male partner smokes. The fertility specialist consensus is clear: smoking cessation should be among the very first steps for any man trying to conceive.

3. Take a Break from Cycling

Cycling is excellent exercise in many contexts, but intense or high-volume cycling creates a specific problem for sperm: sustained heat and pressure on the scrotal area.

The testes are located outside the body because sperm production requires a temperature slightly below core body temperature, typically around 93 to 95 degrees Fahrenheit. Extended time in a compressed cycling position disrupts that thermal balance.

Research has suggested that cycling more than 12 hours per week places enough thermal and physical stress on the testes to negatively affect sperm parameters.

Swapping some cycling sessions for swimming, walking, or low-impact resistance training during the conception window is a reasonable adjustment that does not sacrifice fitness.

4. Skip the Hot Tub

The same temperature logic applies here. Hot tubs, saunas, and prolonged hot baths raise scrotal temperature well above the range sperm need to develop and function properly.

Even a temporary rise in testicular temperature has been shown to reduce sperm count and motility.

Since sperm take roughly three months to fully mature, frequent exposure to heat sources like hot tubs during the preconception period can affect the quality of sperm available when it matters most. Limiting or eliminating hot tub use in the months leading up to trying to conceive is a simple, zero-cost adjustment.

5. Keep Your Laptop Off Your Lap

This tip has evolved from something that sounded like overcaution into something supported by multiple studies. Heat raises sperm temperature and can lower sperm count, and laptops in direct contact with the thighs can generate enough localized heat to elevate scrotal temperature meaningfully, particularly during long work sessions.

Placing your laptop on a desk, a lap desk, or a hard surface creates enough distance to sidestep the issue. It is one of the easiest fertility-friendly changes to make, requiring nothing more than a small shift in habit.

6. Try Couples Acupuncture

Acupuncture sits in a more nuanced category, but the research is genuinely promising and worth exploring, particularly for couples who want a holistic approach alongside conventional care.

Scientific reviews have found that acupuncture treatment was associated with significant improvement in sperm motility and sperm concentration, though researchers note that evidence for its impact on actual pregnancy rates remains inconclusive and more high-quality studies are needed.

A 2024 review published in Integrative Medicine in Nephrology and Andrology highlights growing interest in acupuncture as a complementary therapy, particularly for men with idiopathic infertility where no clear cause has been identified.

The value of couples acupuncture specifically also extends to the relationship dimension. Navigating fertility challenges together, including seeking treatments together, has been shown to reduce the emotional isolation that often accompanies this process.

If you are curious, look for a licensed practitioner with reproductive health experience and approach it as a complement to, not a replacement for, medical evaluation.

7. Skip Lubricant During Sex

Many commercially available lubricants, including some well-known brands, have been shown to impair sperm motility. The gel creates a physical medium that makes it significantly harder for sperm to swim effectively, reducing their chances of reaching and fertilizing an egg.

If lubrication is needed, look for products specifically labeled as fertility-friendly or sperm-safe, such as those formulated to match the pH and consistency of natural cervical mucus. These are widely available and designed not to interfere with sperm function.

Pre-Seed is one commonly cited example, though it is worth reading labels and consulting your OB-GYN for specific recommendations.

8. Be Mindful About Frequency of Ejaculation

The research on frequency is more nuanced than a simple “more is better” or “less is better” position. Having unprotected sex every two to three days throughout the month is a commonly cited recommendation for optimizing conception chances, as this tends to maintain sperm quality while ensuring regular availability.

Abstaining for more than a few days, particularly during the fertile window around ovulation, can result in a higher proportion of older, less motile sperm being present.

Timing and consistency both matter more than most couples realize, and tracking ovulation can help take the guesswork out of timing.

9. Consider Sexual Position

While position is unlikely to be the deciding factor in conception, some evidence and considerable anecdotal support points to the missionary position as offering a mechanical advantage.

By placing the cervix in close proximity to ejaculation and allowing gravity to assist sperm movement toward the uterus, it may give sperm a slight positional advantage. Elevating the hips with a pillow for 15 to 20 minutes after sex has also been suggested as a way to further support this.

It is a low-effort adjustment that costs nothing and may contribute at the margins.

Check out 7 sex positions to try with your partner.

10. Build Healthier Habits Three Months Out

The unifying thread through all of these tips is timing. Because sperm take approximately 72 to 90 days to develop, the habits you establish three months before trying to conceive are the ones that shape the sperm actually in play during that window. That means changes made today will be reflected in sperm quality by the time many couples are in their most active conception months.

Lifestyle factors including diet, physical activity, substance use, stress, sleep, and weight management are now recognized as critical contributors to male fertility, and the research suggests that meaningful improvements are achievable through consistent changes in each of these areas.

More You Can Do

Beyond the ten tips above, eating a diet rich in antioxidants (think leafy greens, berries, walnuts, and fish), managing chronic stress, getting adequate sleep, and limiting alcohol are all evidence-backed habits that support sperm health. Eating a daily portion of walnuts of at least 42 grams has been shown in research to support sperm motility.

If lifestyle adjustments do not yield results after six to twelve months of trying, speaking with a urologist or reproductive endocrinologist is the right next step. A semen analysis is a simple, non-invasive starting point that provides a clear picture of where things stand and what targeted interventions might help.

Fertility is a partnership, and when both people in a relationship invest in their reproductive health, the odds genuinely shift in their favor.

Sources: Healthline, Boost Male Fertility | Frontiers in Endocrinology, BMI and Sperm Quality Meta-Analysis | Frontiers in Endocrinology, Smoking and Male Reproductive Function | Tommy’s, How to Improve Male Fertility