How to Improve Egg Quality: 7 Science-Backed Ways to Boost Fertility

How to improve egg quality naturally? Learn how diet, supplements like CoQ10, and lifestyle changes can support egg health, especially after 40. This guide shares 7 scientific ways and 90-day actionable adjustments to improve your egg quality for better fertility.

How to Improve Egg Quality: What the Science Says

How to improve egg quality? There has long been a pervasive misconception widely circulated in fertility discourse. Your age determines your egg quality, and there is nothing you can do about it. This claim only captures half of the truth.

While you cannot change your chronological age or create new eggs, the quality of the eggs you  do have is not set in stone.

Egg quality is not just about age; it is also about mitochondrial function, oxidative stress, and the nutrient environment in which your eggs mature. And all of these factors are things you can influence.

Each egg takes about 90 days to mature. That means the choices you make today will show up  three months from now. And this is your window of opportunity.

7 science-backed ways to improve egg quality

1. Optimize your diet: rioritise diets rich in antioxidants, unsaturated healthy fats, and high-quality complete protein to nourish developing oocytes.

2. Take targeted supplements: Coenzyme Q10 stands out as the most extensively researched supplement proven to enhance egg quality in clinical studies.

3. Support mitochondrial function: Mitochondria serve as the core energy supply centre for eggs; their stable function is critical to oocyte maturation.

4. Prioritize quality sleep: Sound sleep facilitates melatonin synthesis, a key hormone that shields eggs against oxidative injury.

5. Regulate chronic stress levels: Stress reduction curbs excess cortisol secretion and safeguards the balance of the reproductive endocrine axis.

6. Minimise exposure to environmental toxicants: Limit contact with external pollutants to cut down endogenous free radical accumulation.

7. Time your interventions around the 90-day window: Start all fertility-supporting interventions at least 3 months before trying to conceive.

We will walk you through exactly what you can do to improve your egg quality and go deeper into how these strategies apply specifically if you are over 40 or preparing for IVF.

How to Improve Egg Quality Naturally: The 90-Day Window

An egg takes around 90 days to fully mature from follicle recruitment to ovulation. Eggs are extremely vulnerable to nutrition, oxidative stress, and environmental toxins throughout this developmental phase, making this window ideal for actively boosting oocyte quality.

Fertility experts advise starting dietary, supplemental, and lifestyle modifications 3-4 months before conception attempts. Any positive lifestyle adjustments you adopt now will reflect in your mature eggs three months later.

This 90-day guideline works for both natural conception and IVF preparation. Clinical research strongly supports 8-12 weeks of CoQ10 supplementation before ovarian stimulation to optimise IVF results.

Best Diet for Egg Health: What to Eat (and Avoid)

Diet is one of the most powerful tools you have for improving egg quality. The goal is simple: reduce oxidative stress and provide the building blocks your eggs need.

A Mediterranean-style eating plan, rich in fruits, vegetables, nuts, seeds, whole grains, and lean proteins, is particularly beneficial for optimal fertility.

Antioxidant-Rich Foods

Antioxidants neutralize free radicals that would otherwise damage egg cells.

Berries, leafy greens, citrus, nuts, and seeds deliver high levels of vitamins C and E, beta-carotene, and selenium, nutrients that support follicular development and cellular repair.

Category	Food
Berries	Blueberries, strawberries, raspberries
Leafy greens	Spinach, kale, Swiss chard
Colorful vegetables	Bell peppers, carrots, broccoli

Healthy Fats and Omega-3s

Healthy fats support hormone production; your reproductive hormones rely on fat to form and function properly. Omega-3 fatty acids, in particular, play a vital role in hormone regulation, egg maturation, and reducing inflammation. They also encourage blood flow to your reproductive organs, which helps protect both egg and sperm quality.

Category	Food	Type of Fat	Key Benefits
Fatty fish	Salmon, Sardines,Mackerel	Omega-3 (EPA/DHA)	Reduces inflammation, improves egg quality, delays ovarian aging
Nuts	Walnuts, Flaxseeds, Chia seeds	Omega-3 (ALA)	Provides essential fatty acids and protein, supports hormonal balance
Plant-based	Avocado, Extra virgin olive oil	Monounsaturated fats	Reduces inflammation, supports hormone signaling

Whole Grains and Lean Proteins

Unlike refined carbohydrates (white bread, white rice, pasta) that cause rapid blood sugar spikes, whole grains provide steady energy helps prevent insulin spikes that can disrupt your hormonal balance. Stable blood sugar levels are particularly important for ovulation and hormonal health.

Whole grains are also rich in B vitamins, which are essential for cell development, DNA formation, and hormonal balance. 

Good choices include quinoa, brown rice, oats, and whole wheat bread or cereals. Aim to make at least half of your grain intake whole grains.

Protein provides the amino acids your body needs for tissue repair and hormone production. Choosing lean protein sources helps you get these essential building blocks without excess saturated fat.

Research from a 2025 systematic review published in the European Journal of Public Health has found that protein-rich diets can improve fertility by rebalancing hormones, reducing inflammation, and providing the nutrients needed to support egg quality.

Excellent lean protein sources include skinless chicken and turkey, fish (especially salmon and cod), eggs, Greek yogurt, tofu, lentils, beans, and chickpeas.

For optimal fertility support, include a source of lean protein in each meal, about the size of your palm, and consider incorporating plant-based proteins several times per week.

What to Limit or Avoid

1. Refined carbohydrates and added sugars: Disrupt insulin sensitivity and hormonal balance

2. Trans fats: Found in processed and fried foods—increase inflammation

3. Alcohol and smoking: Both have been shown to have detrimental effects on egg quality

Supplements to Improve Egg Quality: What Works

Supplements are not a substitute for a healthy diet, but for certain nutrients, supplementation provides doses far higher than what you can get from food alone. Here is what the evidence actually says.

CoQ10 (Coenzyme Q10): The Most Studied Supplement

CoQ10 is a critical component of the mitochondrial electron transport chain, and it helps restore mitochondrial efficiency and reduce oxidative damage. Eggs are packed with mitochondria, and as we age, mitochondrial function declines.

A 2024 meta-analysis of six randomized controlled trials involving 1,529 women with diminished ovarian reserve found that CoQ10 pretreatment significantly increased clinical pregnancy rates (OR=1.84), the number of oocytes retrieved, and the number of optimal embryos, while reducing cycle cancellation and miscarriage rates.

A 2026 randomized controlled study of 100 poor ovarian responders found that CoQ10 supplementation significantly improved oocyte count, antral follicle count, and endometrial thickness.

Most reproductive endocrinologists recommend 300 to 600 mg daily for women trying to conceive or preparing for IVF. Start at least 8 to 12 weeks before your planned conception or IVF cycle.

DHEA (Dehydroepiandrosterone)

DHEA is a hormone precursor that may improve ovarian response in women with diminished ovarian reserve (DOR).

A 2025 clinical study of 80 women with low ovarian reserve found that DHEA supplementation at 75 mg/day for 12 weeks was associated with improved hormonal markers, follicular development, and pregnancy rates.

Important caution: DHEA is a hormone and must be taken under medical supervision. It is not appropriate for everyone.

NAC (N-Acetylcysteine)

NAC is a precursor to glutathione, one of the body's most important endogenous antioxidants.

A prospective randomized study of 200 women of advanced age undergoing IVF found that NAC supplementation for approximately 45 days significantly increased the number of high-quality blastocysts (1.82 vs. 1.43, p = 0.014) and increased glutathione levels in follicular fluid.

Research suggests NAC improves oocyte quality by reducing oxidative stress and enhancing mitochondrial function.

Other Key Nutrients

1. Folate (Vitamin B9): Supports egg maturation and early embryonic development.

2. Vitamin D: Linked to ovarian function and hormone balance.

3. Omega-3 fatty acids: Reduce inflammation and support cell membrane health.

4. Melatonin: Acts as a powerful antioxidant that protects eggs from oxidative stress.

Lifestyle Factors That Affect Egg Quality

Beyond diet and supplements, your daily habits play a significant role in egg health.

Sleep and Melatonin

Sleep is essential. Melatonin, the hormone produced during sleep, acts as a powerful antioxidant that protects eggs from oxidative stress.

Poor or irregular sleep suppresses natural melatonin production, which can negatively impact egg quality.

Regularly sleeping fewer than six hours per night can impact hormonal balance and hinder fertility treatment response.

Exercise in Moderation

Moderate exercise improves blood circulation and hormonal balance. However, extreme exercise, especially endurance training, can disrupt ovulation and hormone production.

Aim for balanced, moderate activity like walking, yoga, or light strength training.

Stress Management

Chronic stress elevates cortisol, which can interfere with the hypothalamic-pituitary-ovarian axis, the hormonal system that controls ovulation.

Mindfulness, meditation, and gentle movement like yoga can help.

Avoid Environmental Toxins

1. Smoking: One of the most damaging things you can do for egg quality.

2. Excessive alcohol: Reduces fertility and harms egg health.

3. Environmental toxins: Limit exposure to pesticides and industrial chemicals where possible.

How to Improve Egg Quality After 40

A chromosomally normal egg contains 23 chromosomes. When fertilized by a sperm carrying another 23 chromosomes, the resulting embryo has a total of 46 chromosomes, the blueprint for a healthy pregnancy.

The table below shows how egg quality declines with age, both in terms of chromosomally normal eggs and the percentage of eggs with chromosomal abnormalities.

Age	Chromosomally Normal Eggs (%)	Chromosomal Abnormality Rate (%)
Under 35	~70%	~25%
35	~60%	~25–30%
40	~35%	>50%

As the table shows, the decline is not linear; it accelerates after age 35. By age 40, more than half of a woman's eggs are chromosomally abnormal, which is a primary reason why fertility and IVF success rates drop significantly in this age group.

If you are over 40, you face a different reality. At this age, improving egg quality is not about creating perfect eggs; it is about supporting the best possible eggs you have left. The focus should be on:

1. Mitochondrial support: CoQ10 is non-negotiable. Most specialists recommend 300-600 mg/day.

2. Antioxidant protection: A diet rich in colorful fruits, vegetables, and healthy fats.

3. Sleep: Melatonin, produced during sleep, protects eggs from oxidative stress. Poor sleep reduces melatonin production and can negatively impact egg quality.

4. Time sensitivity: The 90-day rule applies here too, but at 40+, every month counts. If you have been trying for 6 months without success, do not wait. Seek medical evaluation promptly.

How to Improve Egg Quality for IVF

For women undergoing IVF, improving egg quality is not just a nice-to-have—it is one of the most important things you can do to improve your chances of success.

IVF is expensive, emotionally demanding, and time-intensive. Higher-quality eggs lead to more fertilized eggs, more high-quality embryos, and ultimately, higher pregnancy and live birth rates.

The IVF-specific approach

1. Start 90 days before your cycle: Begin dietary changes, supplements, and lifestyle adjustments at least 3 months before egg retrieval.

2. CoQ10: The evidence is strongest here. A 2024 meta-analysis showed CoQ10 pretreatment significantly improves IVF/ICSI outcomes for women with diminished ovarian reserve.

3. DHEA and NAC: For women with diminished ovarian reserve, DHEA (under medical supervision) may improve ovarian response and pregnancy rates. NAC may improve blastocyst quality, particularly in women of advanced age.

4. Acupuncture: Some evidence suggests acupuncture may support egg quality and IVF outcomes.

5. Nutrition: A fertility-friendly diet emphasizing whole foods, steady energy, and anti-inflammatory ingredients helps prepare the body for IVF.

Conclusion

How to improve egg quality? Age cannot be reversed, nor can new eggs be generated, yet you are able to protect your existing eggs by boosting mitochondrial performance and mitigating oxidative damage.

While chronological age remains unmodifiable, your daily diet, supplementation regimen, sleep schedule and lifestyle choices stay fully within your power. Meaningful improvements to oocyte quality are entirely achievable. Taking action today delivers vital nourishment to maturing eggs for optimal reproductive outcomes.

Frequently Asked Questions (FAQs)

1. Can I get pregnant with poor egg quality? 

Yes. Poor egg quality makes conception harder, but it does not make it impossible. With the right medical guidance and support, many women in this situation go on to have successful pregnancies.

2. What are the signs of poor egg quality?

Poor egg quality does not always produce obvious symptoms, but there are several red flags to watch for.

12+ months of failed conception (6 months for women over 35), recurrent early miscarriages linked to egg chromosomal errors, irregular menstrual cycles, and low egg yield during IVF stimulation.

2. At what age should I be more concerned about fertility?

Fertility starts to decline gradually from age 32, with a more rapid decline after 35. If you are under 35 and have been trying for 12 months without success; or over 35 and trying for 6 months, seek medical evaluation.

For women over 40, do not delay; early intervention makes a significant difference.