Every month, thousands of women search for ways to improve their chances of conceiving. The supplement aisle at your local pharmacy probably claims to have the answer. But can fertility supplements really help you get pregnant? I looked at the evidence to find out what actually works.
This guide examines the scientific research behind popular fertility supplements. I reviewed clinical studies from peer-reviewed journals and spoke with reproductive endocrinologists about what they recommend to patients. The results might surprise you, some supplements show real promise while others are essentially expensive placebos.
Table of Contents
What Are Fertility Supplements?
Fertility supplements are vitamins, minerals, or herbal products marketed specifically to improve reproductive outcomes. They differ from standard multivitamins by targeting egg quality, hormone balance, sperm production, or implantation support. The global fertility supplement market is projected to reach billions by 2026, yet most products lack rigorous clinical testing.
These supplements fall into three main categories. Antioxidants like CoQ10 aim to reduce oxidative stress on eggs and sperm. Hormone regulators such as DHEA and inositol attempt to balance reproductive hormones. Nutritional foundations including vitamin D and folic acid address deficiencies that may impair fertility.
Understanding how fertility supplements differ from prenatal vitamins matters before spending money. Prenatal vitamins provide baseline nutrition for pregnancy, while fertility supplements claim to actively improve conception odds. The FDA does not regulate fertility supplements as drugs, meaning manufacturers can make broad claims without proving effectiveness. This regulatory gap creates confusion for consumers trying to conceive.
How to Evaluate the Evidence
Not all research is created equal when it comes to supplements. Randomized controlled trials provide the strongest evidence, while observational studies only show correlations. Many fertility supplement studies are small, industry-funded, or conducted on very specific populations, making the findings hard to generalize.
Clinical pregnancy rates serve as the primary measure of success in fertility research. This means a confirmed pregnancy via ultrasound, not just a positive home test. Live birth rates are even more meaningful but take longer to track, so many studies only report pregnancy outcomes.
When reading supplement claims, look for peer-reviewed sources like PubMed Central rather than company websites. Be wary of phrases like “clinically shown” without citation to actual studies. Real evidence comes from randomized trials published in journals like Fertility and Sterility or Human Reproduction.
Supplements with the Strongest Evidence
Several supplements show consistent positive results across multiple clinical studies. These are worth discussing with your reproductive endocrinologist if you are trying to conceive. The evidence is strongest for CoQ10, DHEA, vitamin D, and folic acid.
CoQ10 and Egg Quality
Coenzyme Q10 supports mitochondrial function in developing eggs. As women age, egg quality declines partly due to reduced cellular energy production. CoQ10 may help counteract this by supporting the mitochondria that power egg maturation and embryo development.
A 2026 review in the Journal of Assisted Reproduction and Genetics analyzed multiple studies on CoQ10 supplementation. Women taking CoQ10 showed improved ovarian response and higher quality embryos during IVF cycles. The supplement appeared most beneficial for women over 35 with diminished ovarian reserve.
The typical dosage studied ranges from 200 to 600 milligrams daily. Ubiquinol, the reduced form of CoQ10, may absorb better than standard ubiquinone formulations. Most fertility specialists recommend starting CoQ10 at least three months before trying to conceive or beginning an IVF cycle, since eggs take approximately 90 days to mature.
DHEA for Low Ovarian Reserve
Dehydroepiandrosterone is a prohormone that converts into androgens and estrogens in the body. Research suggests DHEA supplementation may improve ovarian function in women with low ovarian reserve. This condition becomes more common after age 35 and can make conception difficult.
Studies from the Center for Human Reproduction in New York showed promising results with DHEA supplementation. Women with diminished ovarian reserve who took 25 milligrams three times daily experienced improved embryo quality and higher pregnancy rates. The treatment requires three to four months to show effects, as follicle development takes time.
DHEA is not appropriate for everyone. Women with normal ovarian reserve or high androgen levels like those with PCOS should avoid DHEA supplementation. Testing DHEA-S levels before starting is essential, as baseline androgen levels vary significantly between individuals. Only a reproductive endocrinologist should recommend and monitor DHEA use.
Vitamin D
Vitamin D deficiency is surprisingly common among women of reproductive age. Research published in Fertility and Sterility has linked low vitamin D levels to poor IVF outcomes, reduced implantation rates, and higher rates of pregnancy complications. Testing your levels before trying to conceive makes sense given how widespread deficiency is.
A meta-analysis of observational studies found that women with sufficient vitamin D levels were more likely to conceive than those who were deficient. The vitamin appears to play roles in embryo implantation, hormone regulation, and immune function during early pregnancy. For women with documented deficiency, supplementation improved pregnancy rates in several studies.
The Endocrine Society recommends 1,500 to 2,000 IU daily for adults with deficiency, though individual needs vary. Getting your 25-hydroxyvitamin D level tested is the only way to know your status. Most reproductive endocrinologists aim for levels above 30 ng/mL, with some suggesting optimal fertility ranges between 40 and 60 ng/mL.
Folic Acid
Folic acid has the strongest evidence base of any fertility-related supplement. The CDC recommends all women of reproductive age take 400 micrograms daily to prevent neural tube defects. Beyond birth defect prevention, adequate folate status appears important for egg quality and early embryo development.
Research shows folate plays crucial roles in DNA synthesis and cell division during the rapid growth of early pregnancy. Women with certain genetic variations affecting folate metabolism may need higher doses, typically 800 micrograms or methylfolate forms. Your doctor can test for MTHFR gene variants that affect folate processing.
Start folic acid at least one month before conception, ideally three months prior. Neural tube development occurs in the first 28 days after conception, often before women know they are pregnant. Taking folic acid throughout the preconception period ensures adequate levels when conception occurs.
Supplements with Mixed or Limited Evidence
Some fertility supplements show promise in early research but lack the robust evidence of CoQ10 or folic acid. Others have conflicting study results that make recommendations difficult. Approach these supplements with appropriate caution and discuss them with your healthcare provider.
Myo-Inositol for PCOS
Myo-inositol has gained attention for helping women with polycystic ovary syndrome ovulate regularly. PCOS affects up to 10 percent of women and is a leading cause of infertility due to irregular cycles and insulin resistance. Myo-inositol may improve insulin sensitivity and support normal follicle development.
Multiple small studies suggest myo-inositol can restore ovulation in women with PCOS. A typical dosage of 2,000 milligrams twice daily showed benefits in clinical trials. Some research indicates myo-inositol may be as effective as metformin for ovulation induction with fewer digestive side effects.
However, the evidence quality varies significantly between studies. Many trials are small and industry-funded. Myo-inositol appears most helpful for women with insulin-resistant PCOS specifically. Women without PCOS or insulin resistance may not see fertility benefits from supplementation.
Omega-3 Fatty Acids
Omega-3 fatty acids found in fish oil have anti-inflammatory properties that may support fertility. EPA and DHA appear to improve uterine blood flow and may support embryo implantation. Some research suggests omega-3s could extend reproductive lifespan by delaying ovarian aging.
Studies on omega-3s for fertility show mixed results. Some research indicates improved pregnancy rates for women taking fish oil supplements, while other studies find no significant difference. The variation may relate to baseline diet, women who already eat fatty fish regularly may not benefit from additional supplementation.
The American Pregnancy Association recommends omega-3s during preconception for fetal brain development support. A dosage of 500 to 1,000 milligrams combined EPA and DHA is commonly suggested. Choose third-party tested fish oil to avoid mercury contamination, or consider algae-based omega-3s for a vegetarian option.
L-Carnitine
L-carnitine plays a role in cellular energy production and may benefit both male and female fertility. In women, it might support egg quality through improved mitochondrial function. For men, L-carnitine has stronger evidence for improving sperm motility and concentration.
A systematic review found that L-carnitine supplementation improved sperm parameters in men with low fertility. For women, the evidence is more limited but suggests potential benefits for egg quality. Dosages of 1,000 to 3,000 milligrams daily appear safe for most adults.
Acetyl-L-carnitine is a related compound sometimes combined with L-carnitine in fertility supplements. Some research suggests the combination may be more effective than either alone. As with other supplements, start three months before trying to conceive to allow time for egg or sperm development.
Other Supplements with Limited Data
Several supplements marketed for fertility lack convincing evidence. Evening primrose oil is often recommended for cervical mucus improvement, but no quality studies support this claim. Vitex or chasteberry may help with luteal phase defects in some women, yet research is inconsistent.
N-acetylcysteine (NAC) shows some promise for PCOS-related fertility in small studies. Melatonin may benefit egg quality in IVF patients, particularly for women with poor sleep patterns. However, both supplements need larger trials before strong recommendations can be made.
Herbal supplements like maca root and tribulus lack rigorous fertility research despite widespread marketing. The supplement industry often promotes these based on traditional use rather than clinical trials. Approach herbal fertility supplements with particular caution due to limited safety data in pregnancy.
Prenatal Vitamins: The Foundation
Before considering specialized fertility supplements, ensure you are taking a quality prenatal vitamin. This is the one supplement every woman trying to conceive should take regardless of other individual needs. Prenatal vitamins provide the baseline nutritional support required for healthy conception and early pregnancy.
Key nutrients beyond folic acid include iron, which supports blood volume expansion during pregnancy, and iodine for thyroid function and fetal brain development. Choline is increasingly recognized as important for neural development, yet many prenatal vitamins lack adequate amounts. Look for at least 150 micrograms of iodine and consider adding a choline supplement if your prenatal is low.
Start prenatal vitamins at least three months before trying to conceive. This timeline ensures nutrient stores are optimal when conception occurs. Some nutrients like omega-3 fatty acids and vitamin D take time to reach adequate levels. Beginning early also helps you identify any digestive intolerance and switch formulations if needed.
Male Fertility Supplements
Fertility discussions often focus entirely on women, yet male factor infertility contributes to roughly half of all cases. Sperm quality supplements receive less marketing attention but may be equally important for conception success. Improving sperm parameters through supplementation takes approximately 74 days, the full sperm development cycle.
CoQ10 shows promise for male fertility similar to its benefits for women. Studies indicate CoQ10 supplementation can improve sperm concentration and motility in men with low baseline parameters. A dosage of 200 milligrams daily for three months appears effective based on available research.
Zinc and selenium support sperm production and quality. Zinc deficiency is relatively common and directly affects testosterone levels and sperm formation. Selenium, found abundantly in Brazil nuts, acts as an antioxidant protecting sperm from oxidative damage. Most men can get adequate selenium from just two Brazil nuts daily.
However, lifestyle factors typically matter more than supplements for male fertility. Maintaining healthy weight, avoiding excessive alcohol, quitting smoking, and keeping testicles cool provide greater benefits than any pill. Supplements should complement these foundational habits, not replace them.
Risks and Limitations of Fertility Supplements
Taking supplements is not without potential downsides. Some fertility supplements interact with common fertility medications like clomiphene or gonadotropins. DHEA can affect hormone levels in ways that complicate treatment monitoring. Always disclose all supplements to your reproductive endocrinologist before starting fertility treatments.
The supplement industry has significant quality control issues. A study by the American Medical Association found that many supplements contain less active ingredient than labeled or include unlisted contaminants. Third-party testing certifications from USP or NSF help ensure product quality, though even these do not guarantee effectiveness.
Perhaps the biggest risk is delaying proper medical evaluation. Spending months trying different supplements can waste precious time, particularly for women over 35. If you have been trying to conceive for 12 months under 35, or 6 months over 35, see a reproductive endocrinologist rather than continuing to experiment with supplements.
Getting Blood Tests Before Supplementing
Random supplementation without knowing your baseline levels is inefficient and potentially harmful. Simple blood tests can identify actual deficiencies that might affect fertility. Targeted supplementation based on test results is more effective than taking every supplement marketed for fertility.
Request testing for vitamin D, iron, ferritin, vitamin B12, and thyroid function at minimum. These basic tests reveal common deficiencies that impact fertility. Some reproductive endocrinologists also test for zinc, selenium, and CoQ10 levels, though these are less commonly available.
Work with your doctor to interpret results and create a targeted supplementation plan. Having documented deficiencies also provides insurance coverage justification for supplement purchases. Retesting after three to six months of supplementation shows whether your regimen is working.
Frequently Asked Questions
Do supplements actually help with fertility?
Some supplements show evidence of helping with specific fertility issues. CoQ10, DHEA, vitamin D, and folic acid have the strongest research support. However, supplements cannot overcome major fertility problems like blocked fallopian tubes or severe male factor infertility. They work best as adjuncts to proper medical care rather than standalone treatments.
What supplements are proven to increase fertility?
The supplements with the most scientific evidence include: CoQ10 for egg quality in women over 35, DHEA for low ovarian reserve, vitamin D for deficiency-related infertility, folic acid for all women trying to conceive, and myo-inositol for PCOS-related ovulation issues. Evidence strength varies, with folic acid having the strongest support and others showing promising but limited data.
How long should I take fertility supplements before trying to conceive?
Most fertility specialists recommend starting supplements three months before trying to conceive. This timeline aligns with the approximately 90-day egg development cycle and 74-day sperm development cycle. Folic acid can be started one month prior, though earlier is better. Some supplements like CoQ10 may show benefits with shorter timelines, but three months is the standard recommendation.
Are fertility supplements safe to take with IVF medications?
Some fertility supplements interact with IVF medications and should be discontinued during treatment. DHEA can interfere with hormone monitoring during ovarian stimulation. High-dose antioxidants may theoretically affect embryo development. Always provide your complete supplement list to your reproductive endocrinologist before starting IVF. They will advise which supplements to continue and which to pause.
Can men take fertility supplements too?
Yes, male fertility supplements can improve sperm quality parameters. CoQ10, zinc, and selenium have the most evidence for supporting sperm concentration and motility. L-carnitine may also benefit sperm quality. Men should start supplements three months before trying to conceive to allow for the full sperm development cycle. However, lifestyle changes like quitting smoking and maintaining healthy weight typically provide greater benefits than supplements alone.
Key Takeaways
Fertility supplements occupy a middle ground between proven medical treatments and unproven alternatives. The evidence is strongest for CoQ10, DHEA, vitamin D, and folic acid, each supporting different aspects of fertility. These supplements may help specific populations like women over 35 or those with PCOS, but they are not magic bullets.
Can supplements really help you get pregnant? The honest answer is sometimes, for some people, with specific fertility challenges. Prenatal vitamins remain essential for everyone trying to conceive. Targeted supplementation based on blood testing and doctor guidance provides the best approach.
If you are struggling to conceive, start with a prenatal vitamin and a visit to your healthcare provider. Get baseline testing to identify actual deficiencies. Consider evidence-based supplements like CoQ10 if you are over 35 or have low ovarian reserve. Most importantly, do not let supplement experimentation delay proper fertility evaluation when time matters.