It feels like everyone knows someone struggling to conceive. Maybe it’s your sister. Your coworker. The friend who said, “We thought it would happen right away.” Maybe it’s you.
The phrase “fertility crisis” has started appearing in headlines, but for many couples, it doesn’t feel like a headline. It feels personal. It feels quiet. It feels like months turning into years, appointments stacking up, and questions without clear answers.
At WeNatal, we feel this deeply and believe this moment calls for compassion and clarity. Because while fertility rates are declining globally, infertility is not a personal failure. It is often the result of modern biology colliding with modern life.
Let’s talk about what the data shows and what we can actually do about it.
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Are fertility rates really declining?
Yes, and the trend is global.
In the United States, the CDC reports that the general fertility rate declined again in 2024, continuing a long downward trend over the last decade. The U.S. total fertility rate is now well below replacement level .
Worldwide, the pattern is similar. A large 2024 analysis published in The Lancet examining 204 countries found that global fertility rates have fallen from approximately 4.9 births per woman in the 1950s to roughly 2.3 today, with projections that many countries will remain below replacement levels in the coming decades.
At the same time, the World Health Organization reports that approximately 1 in 6 adults globally experience infertility at some point in their lives.
That’s not rare. That’s common. And while declining birth rates are influenced by economic, cultural, and timing decisions, biology is undeniably part of the story.
What’s driving the decline in fertility?
There is no single cause. Instead, it’s a convergence of factors, many subtle, many cumulative.
1. Metabolic health and inflammation
Modern fertility is deeply intertwined with metabolic health. Insulin resistance, chronic inflammation, blood sugar instability, and excess visceral fat can disrupt ovulation, hormone signaling, and implantation in women. In men, metabolic dysfunction is associated with lower testosterone, impaired spermatogenesis, and increased oxidative stress.
We are living in an environment where ultra-processed food is abundant, sleep is shortened, and stress is normalized. Reproductive systems are exquisitely sensitive to these pressures.
2. Diet quality and micronutrient gaps
Reproduction is nutrient-intensive. Folate (in bioavailable forms), choline, iodine, iron, zinc, selenium, omega-3 fatty acids, and antioxidants all play essential roles in egg and sperm development.
Research suggests adherence to a Mediterranean-style dietary pattern, which is rich in vegetables, fruits, olive oil, seafood, legumes, and nuts, is associated with improved fertility markers, including better semen parameters in men and improved reproductive outcomes in women.
It’s not about dieting. It’s about nourishment.
RELATED: What to know about the Mediterranean Diet for fertility—aka the fertility-boosting diet
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3. Environmental exposures
Endocrine-disrupting chemicals, including certain plastics (BPA), phthalates, pesticides, and PFAS, have been associated with adverse reproductive outcomes, particularly in men.
Emerging research in Fertility & Sterility highlights links between environmental exposures and altered semen quality, hormonal disruption, and oxidative stress pathways.
Our environment has changed dramatically in the past 50 years. Our biology has not.
4. Stress, mental health, and isolation
Chronic stress affects sleep, insulin sensitivity, inflammation, libido, and relationship dynamics. Fertility challenges themselves can become a source of profound emotional distress, creating a feedback loop.
In conversations with clients, one theme comes up again and again: couples often feel alone in this. And loneliness magnifies stress.
Fertility isn’t just hormonal. It’s relational. It’s emotional. It’s deeply human.
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Why we must talk more about men
For decades, fertility conversations centered almost entirely on women. But the science tells a fuller story.
A 2017 meta-analysis in Human Reproduction Update found significant declines in sperm concentration and total sperm count over time, particularly in Western countries. A 2023 update confirmed that the decline is ongoing and may be accelerating.
Male factor infertility contributes to approximately 40–50% of infertility cases.
And here’s the hopeful part: sperm regenerate approximately every 70–90 days. That means change is possible and can occur relatively quickly.
Oxidative stress is a major contributor to sperm DNA fragmentation and impaired motility. Antioxidants such as zinc, selenium, vitamin C, vitamin E, CoQ10, and omega-3 fatty acids play protective roles in sperm development and membrane integrity.
The American Urological Association and the American Society for Reproductive Medicine acknowledge that lifestyle and nutritional optimization are foundational in male infertility management.
Men are not bystanders in fertility. They are half of the equation, both biologically and emotionally.
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So what can we do to support fertility?
Not perfectly. Not obsessively. But intentionally.
We start by stabilizing blood sugar and building metabolic resilience through adequate protein, fiber-rich plants, healthy fats, and strength training. We prioritize sleep as if it matters, because it does.
We reduce alcohol and nicotine exposure. We minimize plastics where we reasonably can. We choose whole foods more often than processed ones.
For men, we focus on antioxidant-rich foods, omega-3 intake, adequate zinc and selenium, resistance training, stress management, and avoiding chronic heat exposure to the testes.
For women, we support ovulatory health, nutrient repletion, thyroid health, and inflammatory regulation.
And for both partners, we remember that fertility is not a solo endeavor. It is a shared journey.
A note from WeNatal on supporting fertility naturally in the midst of the modern fertility crisis
If you are in this season of trying, waiting, grieving, and hoping, we see you.
The data can feel overwhelming. The headlines can feel scary. But fertility is not determined by one statistic. It is shaped by daily rhythms, shared responsibility, nourishment, and support.
We believe fertility is not just a “her” journey. It is a we journey.
Supporting egg and sperm health begins long before pregnancy. It begins with restoring micronutrient sufficiency, reducing oxidative stress, strengthening metabolic health, and tending to emotional wellbeing.
And while we cannot control every environmental or societal factor, we can influence the biology within our homes, our kitchens, our sleep routines, and our partnerships.
The fertility conversation doesn’t need more fear. It needs more partnership. More science. More compassion. And above all, more support.
References
Brannigan RE, Hermanson L, Kaczmarek J, Kim SK, Kirkby E, Tanrikut C. Updates to Male Infertility: AUA/ASRM Guideline (2024). J Urol. 2024;212(6):789-799. doi:10.1097/JU.0000000000004180
GBD 2021 Fertility and Forecasting Collaborators. Global fertility in 204 countries and territories, 1950-2021, with forecasts to 2100: a comprehensive demographic analysis for the Global Burden of Disease Study 2021. Lancet. 2024;403(10440):2057-2099. doi:10.1016/S0140-6736(24)00550-6
Kaltsas A. Oxidative Stress and Male Infertility: The Protective Role of Antioxidants. Medicina (Kaunas). 2023;59(10):1769. Published 2023 Oct 4. doi:10.3390/medicina59101769
Lahimer M, Abou Diwan M, Montjean D, et al. Endocrine disrupting chemicals and male fertility: from physiological to molecular effects. Front Public Health. 2023;11:1232646. Published 2023 Oct 10. doi:10.3389/fpubh.2023.1232646
Levine H, Jørgensen N, Martino-Andrade A, et al. Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries. Hum Reprod Update. 2023;29(2):157-176. doi:10.1093/humupd/dmac035
Mínguez-Alarcón L, Gaskins AJ, Meeker JD, Braun JM, Chavarro JE. Endocrine-disrupting chemicals and male reproductive health. Fertil Steril. 2023;120(6):1138-1149. doi:10.1016/j.fertnstert.2023.10.008
Muffone ARMC, de Oliveira Lübke PDP, Rabito EI. Mediterranean diet and infertility: a systematic review with meta-analysis of cohort studies. Nutr Rev. 2023;81(7):775-789. doi:10.1093/nutrit/nuac087
Stavros S, Kathopoulis N, Moustakli E, et al. Endocrine-Disrupting Chemicals and Male Infertility: Mechanisms, Risks, and Regulatory Challenges. J Xenobiot. 2025;15(5):165. Published 2025 Oct 13. doi:10.3390/jox15050165
World Health Organization: WHO. 1 in 6 people globally affected by infertility: WHO. World Health Organization. https://www.who.int/news/item/04-04-2023-1-in-6-people-globally-affected-by-infertility. Published April 4, 2023.
