When a couple starts trying to conceive, supplements are often the first thing they reach for, and it is an area with real, useful evidence, as long as you keep expectations honest. Fertility is a two-person project, so this guide covers both partners. A few supplements genuinely support the nutritional groundwork of conception, a couple have solid evidence in specific situations like PCOS, and the male side, often neglected, has its own antioxidant story. What no supplement can do is fix a structural or medical cause of infertility, which is why timing your move to a specialist matters as much as anything in a bottle. Here is what actually helps, for her and for him.
The short version
- For her: folate before conception and a good prenatal are the foundation; vitamin D and omega-3 commonly added.
- CoQ10 is studied for egg and sperm quality; myo-inositol has solid evidence for ovulation in PCOS.
- For him: antioxidants (CoQ10, vitamin C and E, zinc, selenium, L-carnitine) may modestly improve sperm parameters.
- The male-fertility evidence is mostly low quality, and lifestyle (heat, smoking, alcohol) matters at least as much.
- Supplements support but do not cure infertility; see a specialist if trying without success.
The shared foundation
Before any targeted supplement, the basics do the most work, and they apply to both partners. A healthy weight, not smoking, limiting alcohol, managing stress, and a nutrient-dense diet all influence fertility more than any capsule. Supplements layer on top of that foundation; they do not replace it. It is also worth starting earlier than people expect, because egg and sperm development happen over months, so the habits and nutrients you put in place now are working on the cells that matter weeks to months down the line.
For her
The female side has the clearest, most established recommendations:
- Folate. The single most important preconception nutrient. Adequate folate, started before conception, sharply reduces the risk of neural tube defects. Either folic acid or methylfolate works; see our folate guide.
- A prenatal vitamin. Starting a quality prenatal before conception covers folate, iodine, and other key nutrients. Our best prenatal vitamins guide covers what to look for.
- CoQ10. Because eggs are energy-hungry cells, CoQ10 is studied for supporting egg quality, particularly in older women. The evidence is promising rather than definitive. See our CoQ10 guide.
- Vitamin D. Low vitamin D is common and has been linked to reproductive outcomes; correcting a deficiency is sensible.
- Omega-3. Supports general reproductive health and is recommended into pregnancy for fetal development.
Myo-inositol and PCOS
One supplement deserves a dedicated mention because its evidence is among the strongest here: myo-inositol for polycystic ovary syndrome (PCOS), a leading cause of ovulation problems. Myo-inositol improves insulin sensitivity, helps restore more regular ovulation, and supports egg quality in women with PCOS, and it is often paired with d-chiro-inositol in a physiologic ratio. It is well tolerated and widely used as a first-line option for PCOS-related fertility issues. We cover it in depth in our guide to inositol for PCOS. As always, it works best as part of a plan guided by your doctor.
For him
Male fertility is half the equation and often overlooked. The supplement story here centers on antioxidants, because oxidative stress can damage sperm DNA and impair sperm quality. The most-studied options:
| Supplement | Studied for |
|---|---|
| CoQ10 | Sperm count and motility |
| Zinc and selenium | Sperm production and quality |
| Vitamin C and vitamin E | Antioxidant protection of sperm |
| L-carnitine | Sperm energy and motility |
| Folate | Sperm health (often paired with zinc) |
Reviews suggest these may modestly improve sperm parameters like count and motility. But two honest caveats: the evidence is generally low quality, and the effect on what actually matters, pregnancy and live birth, is uncertain. Lifestyle is at least as important: avoiding excess heat (hot tubs, laptops on the lap), not smoking, limiting alcohol, and maintaining a healthy weight all influence sperm quality.
The honest take on the evidence
It is worth being straight about the quality of this research. Much of the fertility-supplement evidence, especially for men, comes from small studies that measure markers (like sperm count or egg quality) rather than the outcome couples care about, a healthy baby. Improving a marker is encouraging but not the same as improving live birth rates, and large, high-quality trials are scarce. That does not make these supplements pointless; folate is genuinely essential, myo-inositol has real PCOS evidence, and the antioxidants are low-risk. It just means you should view them as a reasonable, supportive bet, not a guarantee, and not a reason to postpone proper medical evaluation.
When to see a specialist
This is the most important practical point. General guidance is to seek a fertility evaluation after 12 months of trying without success, or after 6 months if the woman is over 35, and sooner if there are known issues like irregular cycles, PCOS, endometriosis, or a history of reproductive problems. The danger is letting a supplement routine quietly delay a workup, because age and time matter in fertility. A specialist can identify causes no supplement can touch and offer treatments with far stronger evidence. Use supplements while you pursue, not instead of, proper care.
Frequently asked questions
What supplements help fertility?
The foundation for women trying to conceive is folate (ideally before conception) and a good prenatal, with vitamin D and omega-3 commonly added. CoQ10 is studied for egg quality, and myo-inositol has solid evidence for ovulation in PCOS. For men, antioxidants such as CoQ10, vitamin C, vitamin E, zinc, and selenium are studied for sperm quality. Supplements support fertility modestly; they do not fix structural or medical causes of infertility.
Does CoQ10 improve egg or sperm quality?
CoQ10 supports the energy production of cells, including eggs and sperm, and it is studied for both. In women, especially older women, it is used to support egg quality, and in men some trials report improvements in sperm count and motility. The evidence is promising but not definitive, and effects on actual pregnancy or live birth are less certain. It is a reasonable, well-tolerated option to discuss with your doctor.
Does myo-inositol help with PCOS and fertility?
Myo-inositol has some of the strongest fertility evidence in this space, specifically for polycystic ovary syndrome (PCOS). It can improve insulin sensitivity, restore more regular ovulation, and support egg quality in women with PCOS, often combined with d-chiro-inositol. It is well tolerated and widely used as a first-line supplement for PCOS-related fertility issues, though it should still be part of a plan guided by your doctor.
What supplements help male fertility and sperm?
Male fertility supplements center on antioxidants, because oxidative stress can damage sperm: CoQ10, vitamin C, vitamin E, zinc, selenium, folate, and L-carnitine are the most studied. Reviews suggest they may modestly improve sperm parameters like count and motility, but the evidence is generally low quality and the effect on live birth is uncertain. Lifestyle factors (avoiding heat, smoking, and excess alcohol) matter at least as much.
When should I see a fertility doctor?
General guidance is to seek evaluation after 12 months of trying without success, or after 6 months if the woman is over 35, and sooner if there are known issues like irregular cycles, PCOS, or a history of reproductive problems. Do not let supplements delay a proper workup. A fertility specialist can identify causes that no supplement can address and offer treatments with far stronger evidence.
Can supplements cure infertility?
No. Supplements can support the nutritional foundation of fertility and modestly improve some markers like egg and sperm quality, but they cannot cure infertility, which often has structural, hormonal, or medical causes that require diagnosis and treatment. Think of supplements as one supporting piece alongside a healthy lifestyle and, when needed, medical care, not as a stand-alone solution.
The bottom line
Fertility supplements are a genuinely useful supporting tool when you keep them in proportion. For women, folate and a quality prenatal are non-negotiable groundwork, CoQ10 is a reasonable bet for egg quality, and myo-inositol is a standout for PCOS. For men, the antioxidant stack may modestly help sperm quality, though the evidence is softer than the marketing suggests, and lifestyle matters just as much. Treat the whole category as support, not a cure, start early, cover both partners, and, crucially, do not let supplements delay seeing a specialist if time or known issues are working against you. The biggest wins in fertility usually come from the foundation and timely medical care, with supplements playing a helpful supporting role.