We’ve long known that environmental factors—from hormone-disrupting plastics to pesticides—can affect fertility. However, a groundbreaking 2024 study from Denmark reminds us just how powerful our living environments can be. It found that exposure to both air pollution and traffic noise significantly increases the risk of infertility in both men and women.
As an OBGYN with a special interest in fertility optimization, I believe this research is not just compelling—it’s actionable.
Conducted by Sørensen et al. and published in The BMJ (2024), this nationwide cohort study followed over 900,000 Danish men and women aged 30–45 between 2000 and 2017. Researchers looked at long-term exposure to fine particulate matter (PM₂.₅) and road traffic noise at residential addresses, and then tracked infertility diagnoses over time.
Here’s what they found:
- Each 2.9 µg/m³ increase in PM₂.₅ was associated with a 24% increased risk of infertility in men.
- Each 10.2 dB increase in road traffic noise led to a 14% increased infertility risk in women aged 35–45.
Even more striking: these exposures affected people before they sought fertility treatments, suggesting the environmental impact is happening upstream, during natural conception attempts.
Infertility is no longer just about age or biology—it’s also about geography.
Many of my patients reside in densely populated urban areas where noise and pollution levels are high. This study underscores a frustrating truth: you can eat well, take the right supplements, and time intercourse ideally—but if you’re living next to a major highway, you may be facing invisible fertility barriers.
This doesn’t mean panic. But it does mean awareness. And from awareness comes action.
Here are evidence-informed, realistic steps you can take:
1. Improve Indoor Air Quality
- Use a HEPA air purifier in your bedroom and living space.
- Keep windows closed during peak traffic hours or when smog alerts are in effect.
- Avoid indoor smoking, candles, or harsh chemical cleaners.
2. Sleep Soundly
- Block street noise with white noise machines or earplugs.
- Consider soundproofing bedroom windows or using heavy curtains.
- Prioritize deep sleep, as circadian disruption may further impair reproductive hormones.
3. Choose Your Environment Carefully
- If possible, avoid living near highways, major intersections, or industrial zones during preconception years.
- Green spaces (parks, tree-lined streets) can help buffer both noise and pollution exposure.
4. Support Detox Pathways
- Antioxidants like vitamin C, vitamin E, selenium, and N-acetylcysteine (NAC) may help counter oxidative stress caused by pollution.
- Adequate hydration, sweating through exercise or sauna, and a nutrient-rich diet all support toxin elimination.
5. Advocate for Environmental Health
- Push for city policies that reduce urban pollution.
- Support green public transport and quieter, healthier neighbourhood planning.
We often think of fertility as something within our control, and much of it is. But studies like this one remind us that public health and reproductive health are deeply intertwined.
If you’re trying to conceive and live in a high-pollution or high-noise area, don’t lose hope. Minor environmental tweaks, combined with the right lifestyle, nutrition, and medical support, can still dramatically improve your chances of success.
Let’s continue to make fertility optimization a personal, medical, and environmental priority.
Reference:
Sørensen, M., Poulsen, A.H., Nøhr, B., et al. “Long‑term exposure to road traffic noise and air pollution and risk of infertility in men and women: nationwide Danish cohort study.” BMJ 2024; 386:e080664.
Dr Marina OBGYN