Insulin Resistance and Fertility: The Hidden Link Affecting Egg Quality, Ovulation, Implantation, and Pregnancy
Insulin resistance is often overlooked during a fertility workup, yet it can influence hormone balance, egg and sperm quality, implantation, IVF outcomes, and pregnancy health. The good news? It’s often highly responsive to targeted lifestyle and integrative therapies.
If you’ve been trying to conceive and wondering why it’s taking longer than expected, insulin resistance may be an important piece of the puzzle.
Most people associate insulin resistance with diabetes, weight gain, or Polyendocrine Metabolic Ovarian Syndrome (PMOS), use to be known as Polycystic Ovary Syndrome (PCOS). What many don’t realize is that insulin also plays a major role in fertility. It influences ovulation, egg quality, sperm health, implantation, and even pregnancy outcomes. It may also contribute to recurrent pregnancy loss, poor embryo development, and reduced IVF success rates.
At Acubalance Wellness Centre in Vancouver, we often see patients who have been told their fertility tests look “normal,” yet they are still struggling to conceive. In some cases, insulin resistance is an underlying factor that has gone unnoticed.
What Is Insulin Resistance?
Insulin is a hormone produced by the pancreas that helps move glucose (sugar) from the bloodstream into the body’s cells where it can be used for energy.
With insulin resistance, the body’s cells become less responsive to insulin. To compensate, the pancreas produces more insulin to keep blood sugar levels under control.
Over time, elevated insulin levels can trigger inflammation, hormone imbalances, and metabolic changes that affect fertility.
The challenge is that insulin resistance can develop years before blood sugar levels become abnormal, which means many people don’t realize they have it.
How Insulin Resistance Affects Fertility
1. It Can Impact Egg Quality
Developing eggs require a healthy environment and large amounts of energy.
Research suggests that insulin resistance may increase inflammation and oxidative stress, which can negatively affect the mitochondria—the energy-producing structures inside the egg. Poor mitochondrial function has been associated with reduced egg quality and embryo development.
2. It Can Disrupt Ovulation
Insulin resistance is one of the major drivers of hormone imbalance in women with PMOS/PCOS.
Elevated insulin levels can stimulate the ovaries to produce more androgens (male-type hormones), making ovulation less predictable and sometimes preventing ovulation altogether.
Even in women without PMOS/PCOS, insulin resistance may contribute to cycle irregularities and hormone imbalances.
3. It Can Affect Sperm Health
Insulin resistance is not only a women’s fertility issue.
Research has linked metabolic dysfunction and insulin resistance with lower sperm counts, reduced motility, and increased DNA fragmentation. These changes may reduce the chances of successful fertilization and healthy embryo development.
4. It May Influence Implantation
Fertility doesn’t stop at creating an embryo.
Successful implantation requires a healthy uterine environment. Chronic inflammation and metabolic dysfunction associated with insulin resistance may affect endometrial receptivity and increase the risk of early pregnancy loss.
Could You Have Insulin Resistance?
Some common signs include:
• Increased abdominal weight or belly fat
• Fatigue, especially after meals
• Sugar or carbohydrate cravings
• PMOS/PCOS
• Skin tags
• Darkened skin patches around the neck or underarms
• Family history of diabetes
However, many people with insulin resistance have no obvious symptoms.
This is why testing can be valuable, particularly when fertility challenges remain unexplained.
Testing for Insulin Resistance
At Acubalance, we often recommend discussing testing with our naturopathic doctors or other healthcare provider when insulin resistance is suspected.
Common tests include:
Fasting Glucose and Insulin
A simple fasting blood test that allows calculation of a HOMA-IR score, a useful marker of insulin sensitivity.
Oral Glucose Tolerance Test (OGTT)
This test measures how your body handles glucose over time and can sometimes identify insulin problems that fasting tests miss. When paired with insulin measurements, it can provide a more complete picture of how your body is regulating blood sugar.
Improving Insulin Sensitivity
The encouraging news is that insulin resistance is often reversible.
Many people see significant improvements through targeted lifestyle and nutrition changes.
Nutrition and Lifestyle
Strategies that may help include:
• Prioritizing protein with meals
• Reducing refined sugars and processed carbohydrates
• Increasing vegetables, legumes, and fibre-rich foods
• Following a Mediterranean-style eating pattern
• Regular exercise and resistance training
• Optimizing sleep
• Managing stress
At Acubalance, we often recommend the Acubalance Fertility Diet as a practical starting point for improving metabolic and reproductive health.
Natural Therapeutics
For some individuals, supplements such as myo-inositol (particularly for women with PMOS/PCOS), berberine, omega-3 fatty acids, NAC, or CoQ10 may be appropriate. These should be individualized based on your health history and fertility goals.
Because oxidative stress is often elevated in insulin resistance, nutrients that support mitochondrial function and cellular energy production may also be considered. Depending on the individual, this may include CoQ10, NAC, omega-3 fatty acids, carnitine, PQQ, glutathione support, and other targeted supplements.
Photobiomodulation (PBM) / Low-Level Laser Therapy (LLLT)
Emerging research suggests that photobiomodulation (also known as low-level laser therapy or LLLT) may support metabolic health by improving cellular energy production, reducing inflammation, enhancing circulation, and supporting healthy glucose metabolism.
PBM works by stimulating the mitochondria—the energy-producing structures within cells—which may help improve insulin sensitivity and reduce oxidative stress. Research has also demonstrated benefits for blood flow, tissue repair, and inflammatory regulation, all of which are important for overall metabolic and reproductive health.
At Acubalance, PBM is often integrated with nutrition, lifestyle strategies, acupuncture, and other therapies as part of a comprehensive approach to supporting fertility and metabolic wellness.
Where Acupuncture Fits In
Research suggests acupuncture may support metabolic health by helping regulate stress responses, reduce inflammation, improve insulin sensitivity, and support hormonal balance.
From a Traditional Chinese Medicine perspective, insulin resistance is often associated with patterns involving Dampness, Phlegm, Qi stagnation, and impaired TCM Spleen function. Treatment focuses on restoring balance, improving circulation, and supporting the body’s ability to regulate metabolism and reproductive hormones.
Next Steps
Insulin resistance is one of the most overlooked contributors to fertility challenges.
It can affect ovulation, egg quality, sperm health, implantation, IVF outcomes, and pregnancy health—even in people who do not have diabetes.
The good news is that insulin resistance is often highly responsive to the right combination of nutrition, lifestyle changes, acupuncture, photobiomodulation (PBM/LLLT), and integrative care.
If you’re struggling to conceive, have PMOS/PCOS, recurrent pregnancy loss, unexplained infertility, concerns about egg quality, or have experienced failed IVF or embryo transfers, insulin resistance may be worth investigating.
At Acubalance Wellness Centre, we combine evidence-informed testing, nutrition, acupuncture, photobiomodulation (PBM/LLLT), and personalized treatment plans to help optimize fertility and reproductive health.
By identifying and addressing underlying metabolic imbalances, many patients improve not only their fertility but also their overall health and long-term well-being.
Call 604-678-8600 or book an initial consultation to learn whether insulin resistance may be affecting your fertility journey.
References
Chang, A. S., Dale, A. N., & Moley, K. H. (2005). Maternal diabetes adversely affects preovulatory oocyte maturation, development, and granulosa cell apoptosis. Endocrinology, 146(5), 2445–2453. https://pubmed.ncbi.nlm.nih.gov/15718275/
Du Plessis,
S. S., Cabler, S., McAlister, D. A., Sabanegh, E., & Agarwal, A. (2010). The effect of obesity on sperm disorders and male infertility. Nature Reviews Urology, 7(3), 153–161. https://doi.org/10.1038/nrurol.2010.6
Dunaif, A. (2012). Insulin resistance in women with polycystic ovary syndrome: Mechanisms and implications for pathogenesis. Endocrine Reviews, 33(6), 981–1030. Insulin Resistance and the Polycystic Ovary Syndrome Revisited: An Update on Mechanisms and Implications
Marchetti, P., Bugliani, M., De Tata, V., Suleiman, M., & Marselli, L. (2012). Pancreatic beta cell identity in humans and the role of transcription factors and epigenetics. Diabetes, Obesity and Metabolism, 14(3), 153–160. Comparison of safety and tolerability with continuous (exenatide once weekly) or intermittent (exenatide twice daily) GLP‐1 receptor agonism in patients with type 2 diabetes
Metwally, M., Ong, K. J., Ledger, W. L., & Li, T. C. (2007). Does high body mass index increase the risk of miscarriage after spontaneous and assisted conception? A meta-analysis of the evidence. Fertility and Sterility, 88(3), 714–726. Differential effects of aging on activin A and its binding protein, follistatin, across the menopause transition
Palmer, N. O., Bakos, H. W., Fullston, T., & Lane, M. (2012). Impact of obesity on male fertility, sperm function and molecular composition. Spermatogenesis, 2(4), 253–263. https://doi.org/10.4161/spmg.21362
Qiao, J., & Feng, H. L. (2011). Extra- and intra-ovarian factors in polycystic ovary syndrome: Impact on oocyte maturation and embryo developmental competence. Human Reproduction Update, 17(1), 17–33. Extra- and intra-ovarian factors in polycystic ovary syndrome: impact on oocyte maturation and embryo developmental competence
Samuel, V. T., & Shulman, G. I. (2016). The pathogenesis of insulin resistance: Integrating signaling pathways and substrate flux. Journal of Clinical Investigation, 126(1), 12–22. The pathogenesis of insulin resistance: integrating signaling pathways and substrate flux
Unfer, V., Carlomagno, G., Dante, G., & Facchinetti, F. (2017). Effects of myo-inositol in women with PCOS: A systematic review of randomized controlled trials. Gynecological Endocrinology, 33(9), 698–703. https://pubmed.ncbi.nlm.nih.gov/22296306/