Egg production in the human body depends on a coordinated system of hormones, supported by specific nutrients and lifestyle factors that influence egg quality at every stage. Two hormones, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), drive the entire process. But beyond hormonal signals, what you eat, how you sleep, and certain supplements can meaningfully affect the quality of the eggs your ovaries produce.
The Hormones That Drive Egg Production
Your brain controls egg production through a chain of signals called the hypothalamic-pituitary-gonadal axis. It starts in the hypothalamus, which releases a trigger hormone that tells the pituitary gland to produce FSH and LH. These two hormones do different but complementary jobs in the ovaries.
FSH stimulates the growth and maturation of ovarian follicles, the tiny fluid-filled sacs that each contain an immature egg. It promotes the proliferation of granulosa cells (the support cells surrounding each egg), helps form the fluid-filled cavity inside growing follicles, and drives the production of estrogen. Without adequate FSH, follicles cannot develop past early stages.
LH plays a supporting role during most of the cycle by stimulating cells in the outer layer of the follicle to produce hormones that, in turn, make the follicle more responsive to FSH. Then, at mid-cycle, a surge of LH triggers ovulation, releasing the mature egg. Follicle development happens in waves: FSH supports the growth of several follicles at once, but as one dominant follicle emerges, FSH levels drop, and the remaining follicles die off. Only the dominant follicle survives to ovulate in response to the LH surge.
CoQ10 and Mitochondrial Energy
Eggs are among the most energy-demanding cells in the body. Maturing an egg and preparing it for fertilization requires enormous amounts of cellular energy (ATP), which is produced by mitochondria. Coenzyme Q10 (CoQ10) sits inside mitochondrial membranes and acts as a key component of the energy production chain. It also functions as an antioxidant, neutralizing free radicals that would otherwise damage the egg’s DNA and internal structures.
CoQ10 levels naturally decline with age, and lower levels are associated with reduced mitochondrial activity, less energy production, and greater oxidative stress inside the egg. Supplementation may help compensate for this decline. Human studies have used oral doses ranging from 180 mg to 1,200 mg per day, typically for two to three months before conception or fertility treatment. The most commonly studied dose is 600 mg daily for at least two months. Research suggests that CoQ10 supplementation increases mitochondrial mass within treated eggs, potentially providing the energy boost that aging eggs lack to complete maturation properly.
Myo-Inositol for Egg Quality
Myo-inositol is a naturally occurring compound found in follicular fluid, the liquid surrounding developing eggs. Higher concentrations of myo-inositol in this fluid are associated with better egg quality. For women with polycystic ovary syndrome (PCOS), supplementation is particularly well studied. A meta-analysis of clinical trials found that women with PCOS who took myo-inositol combined with D-chiro-inositol had a 17% higher likelihood of producing top-grade embryos compared to those taking a placebo.
Most clinical studies used 4 grams of myo-inositol daily alongside 400 micrograms of folic acid, taken for one to three months before fertility treatment. Some studies used a lower dose of 2 grams daily. The combination with folic acid appears consistently across protocols, as folic acid independently supports cell division during early development and is recommended at 400 to 800 micrograms daily for all women of reproductive age.
Omega-3 Fatty Acids and Reproductive Aging
Omega-3 fatty acids, particularly DHA, show strong potential for protecting egg quality as women age. In animal research published in Aging Cell, a diet rich in omega-3 fatty acids extended reproductive function into advanced maternal age, while a diet heavy in omega-6 fatty acids was linked to very poor reproductive outcomes at the same age. The difference was striking at the cellular level: 100% of eggs from animals on a DHA-rich diet showed normal mitochondrial distribution, compared to just 33% on a soy-based diet and 0% on a standard diet.
Spindle integrity, another marker of egg quality critical for proper chromosome separation, was normal in 80% of eggs from omega-3-fed animals versus 0% from the omega-6 group. Perhaps most promising, even short-term dietary changes to increase omega-3 intake, started during the period of natural reproductive decline, improved egg quality. Good dietary sources include fatty fish like salmon, mackerel, and sardines, as well as walnuts and flaxseeds.
How Melatonin Protects Developing Eggs
Melatonin is best known as the sleep hormone, but it plays a direct role in egg health. Produced by the pineal gland during darkness, melatonin circulates through the blood and accumulates in ovarian follicular fluid, where its concentration increases as follicles grow larger. Inside the follicle, melatonin acts as a powerful antioxidant, scavenging free radicals that would otherwise damage the egg and its surrounding support cells.
This means sleep quality has a direct biochemical connection to egg quality. Light exposure at night suppresses melatonin synthesis, reducing both the circulating levels and the amount available to protect developing eggs. Melatonin also helps regulate the secretion of reproductive hormones through its action on the brain’s internal clock. Disrupted sleep patterns can interfere with the precise hormonal timing that follicle development depends on.
Vitamin D and Ovarian Reserve
Vitamin D levels appear to interact with anti-Müllerian hormone (AMH), a marker of how many eggs remain in the ovaries. Research has identified a threshold effect around 30 ng/mL of vitamin D in the blood. Below that level, there is a negative correlation between vitamin D and AMH, meaning insufficient vitamin D is associated with lower ovarian reserve markers. Above 30 ng/mL, the relationship becomes neutral or slightly positive. This aligns with the Endocrine Society’s recommendation of at least 30 ng/mL as a minimum sufficient blood level of vitamin D. Sun exposure, fortified foods, and supplementation are all practical ways to reach and maintain adequate levels.
Antioxidants That Reduce Egg Damage
Oxidative stress is one of the primary threats to egg quality. Free radicals, unstable molecules generated during normal metabolism, can damage an egg’s DNA, disrupt its internal scaffolding (the spindle), and impair its mitochondria. Several antioxidants have demonstrated the ability to counteract this damage. Alpha-lipoic acid (ALA) and acetyl-L-carnitine (ALCAR) both scavenge free radicals effectively enough to significantly reduce damage to egg maturation, spindle structure, mitochondria, and DNA in laboratory studies. Vitamin E has also shown significant protective effects against egg aging.
These antioxidants work through slightly different mechanisms but share the common effect of lowering the oxidative burden on eggs during their vulnerable maturation window.
The Mediterranean Diet and Fertility Outcomes
Dietary patterns matter as much as individual supplements. The Mediterranean diet, rich in vegetables, fruits, whole grains, legumes, olive oil, and fish, is the most studied dietary pattern in fertility research, and the results are consistent. Women in the highest tertile of Mediterranean diet adherence achieved a 50% clinical pregnancy rate during fertility treatment, compared to 29% for those in the lowest tertile. Live birth rates showed a similar gap: 49% versus 27%.
Among women under 35 undergoing their first IVF cycle, higher Mediterranean diet scores were associated with roughly double the likelihood of clinical pregnancy and more than 2.5 times the likelihood of live birth. Higher adherence also correlated with more available embryos per cycle (an average of 8.4 versus 7.4). The diet likely works through multiple pathways at once: it is naturally rich in omega-3 fatty acids, antioxidants, folate, and other micronutrients that individually support egg quality, while being low in the processed foods and trans fats that promote inflammation and oxidative stress.