Can You Get Pregnant Naturally in Your 40s? What Egg-Quality Research Shows

Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition.

Yes, natural conception in your 40s happens, and the biology behind why it becomes harder is better understood now than it used to be. The real story after 35 is not primarily about how many eggs you have left. It is about egg quality, and specifically about the energy-producing machinery inside each egg cell losing efficiency with age. Coenzyme Q10, or CoQ10, plays a direct role in that machinery, and most of what researchers know about supplementing it comes from fertility treatment settings rather than natural conception, which matters for how you should read the research.

Why egg quality, not just egg count, is the real story after 35

Every egg cell relies on mitochondria, the structures inside cells that produce the energy needed for the egg to mature and, later, to support early embryo development. According to a 2025 review published in Frontiers in Cell and Developmental Biology, mitochondria serve as the energy factories of the cell, and egg development requires a substantial amount of that energy. As maternal age increases, cumulus cell function, the support cells surrounding the egg, declines alongside decreased expression of the enzymes responsible for producing CoQ.

What's actually happening inside an aging egg cell

CoQ10 is a required component of the same mitochondrial energy pathway that fuels egg maturation, and the body's own production of it declines naturally with age, coinciding with age-related fertility decline, according to a review indexed on PubMed. This is the mechanistic thread connecting age, egg quality, and the interest in CoQ10 supplementation specifically, rather than antioxidants in general.

What the CoQ10 research shows (and doesn't promise)

In women aged 31 and older, CoQ10 supplementation before and during fertility treatment helps to support fertility, embryo maturation, and embryo quality, according to that same PubMed-indexed review. A separate study published in Fertility and Sterility found that CoQ10 supplementation during oocyte in vitro maturation reduced postmeiotic aneuploidies, meaning fewer chromosomal errors in the maturing egg, according to the study as published.

Animal research supports a similar mechanism at the ovarian-reserve level. In an aged mouse model, long-term CoQ10 supplementation delayed reproductive aging, increased ovarian reserve, and increased ATP production in the eggs, according to research published through the National Institutes of Health. This is a meaningful piece of the mechanistic story, but it is important to be precise about what this research actually covers.

Nearly all of the strongest human data on CoQ10 and egg quality comes from women already undergoing IVF or IVM treatment, not from women trying to conceive naturally at home. That distinction matters. The biological mechanism, aging mitochondria and declining CoQ10 production, applies whether or not someone is in a fertility clinic. But the specific improvements measured in these studies, fertilization rates and embryo quality within a treatment cycle, were measured in a treatment setting. Consider this research a window into the biology at play, not a guarantee about a specific natural-conception timeline.

"What are the things that you can gain from optimizing your health?"

— Dr. Tosin Odunsi, MD, MPH, FACOG, Obstetrics and Gynecology Physician

Supporting mitochondrial and cycle health

Premium Fertility Gummies, with 13 fertility-focused nutrients, includes CoQ10 alongside Myo-Inositol and Methylated Folate. Coenzyme Q10 in this formula supports healthy mitochondrial energy production in eggs and ovarian reserve as part of a preconception routine.† Our doctor-formulated gummies for reproductive wellness also support normal ovulation and menstrual cycle regularity, both relevant as cycles can shift in your late 30s and 40s.† Not for use during pregnancy.

Our 40:1 myo-inositol and D-chiro-inositol blend can pair alongside it to support healthy hormone signaling, ovarian health, and menstrual cycle regularity during the same preconception window.† Myo Chiro 40:1 is not for use during pregnancy either, and requires the provider consultation disclaimer if used while breastfeeding.

"Empowering women at every stage of their journey means something different in your 40s than it did in your 20s, and both are worth honoring."

— Amy Suzanne Upchurch, Founder and CEO of Pink Stork

Setting a realistic, non-catastrophizing timeline

Fertility does decline with age, and that decline is not a myth. But "declining" and "impossible" are very different words, and natural conception in your 40s is not rare. If you have been trying for six months without success, most providers recommend an evaluation at this age rather than waiting the full year sometimes advised for younger women, simply because earlier information gives you and your provider more options sooner. That is a practical step, not a signal that something is presumed wrong.

Frequently asked questions

Why does fertility decline with age?

The decline is driven primarily by egg quality rather than only egg quantity. Mitochondrial function inside the egg cell, which fuels its maturation, declines with age, alongside a natural drop in the body's own CoQ10 production.

Does CoQ10 supplementation improve natural conception chances?

Most of the strongest research on CoQ10 and egg quality comes from women in fertility treatment settings like IVF, measuring outcomes such as fertilization and embryo quality within a treatment cycle. This research explains a biological mechanism relevant to natural conception too, but it was not designed to measure natural conception rates directly.

What does CoQ10 actually do inside an egg cell?

CoQ10 is a required component of the mitochondrial pathway that produces the energy an egg cell needs to mature. Animal research has shown CoQ10 supplementation can increase ATP production in eggs and delay reproductive aging markers.

At what age should I see a fertility specialist if I'm not conceiving?

Many providers recommend evaluation after six months of trying for women over 35, compared with a full year for younger women, since earlier information can open up more options.

Is Premium Fertility Gummies safe to take during pregnancy?

No. Premium Fertility Gummies is formulated for the preconception window while trying to conceive and is not intended for use during pregnancy.

Can I take Myo Chiro 40:1 while breastfeeding?

Myo Chiro 40:1 is not for use during pregnancy, and using it while breastfeeding requires a provider consultation disclaimer. Talk with your provider before starting it in either circumstance.

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.