Omega-3 for Fertility: What Studies Show

This article is part of: Fertility Boost: How Nutrition and Supplements Can Improve the Chances of Getting Pregnant

As a doctor, I am often asked about omega-3 when it comes to fertility, and for good reason: hardly any other nutrient has been so well researched when it comes to cycle, fertility, and pregnancy. The important thing is to separate proven facts from hopes.

That's why I honestly classify here what omega-3 can really do for fertility, what is recognized for pregnancy and the baby, and how best to get it and how much.

Does omega-3 help with fertility?

The role of DHA in pregnancy is recognized and most strongly supported: the mother's intake contributes to the normal development of the child's brain and eyes. The situation regarding becoming pregnant is promising but should be interpreted with caution: In observational studies, women with a good omega-3 supply had a higher chance of becoming pregnant per cycle. These are correlations, not proofs. Overall, omega-3 is a useful building block, but not a guarantee.

Area	What studies show
Baby (DHA)	Recognized: Mother's DHA supports the child's brain and eyes.
Becoming pregnant	Observational studies: higher chance per cycle, no proof.
Pregnancy	Lower risk of premature birth in a large evaluation.
Quantity	250 to 500 mg EPA/DHA, plus around 200 mg DHA in pregnancy.

Omega-3 and Fertility

The most exciting signals regarding fertility come from observational studies. In one prospective study, the intake of omega-3 supplements was associated with significantly higher fertility per cycle (Stanhiser et al., 2022). Even in artificial insemination, higher omega-3 levels in the blood were linked to better chances of pregnancy (Chiu et al., 2018).

Honest assessment: These are correlations from observational studies, not proof that omega-3 improves egg quality or guarantees pregnancy. The effect is biologically plausible, but large randomized studies are still lacking. You can read about other nutrients that play a role in fertility in our article on Nutrients for Fertility.

During Pregnancy: DHA for the Baby

Here, the evidence is strongest. It is scientifically recognized that maternal intake of DHA contributes to the normal development of the brain and eyes of the unborn child and breastfed infant. For this, approximately 200 milligrams of DHA per day are recommended in addition to the general recommendation.

Furthermore, there is a strong signal from a large review: Omega-3 intake during pregnancy reduced the risk of premature birth, especially very early birth (Middleton et al., 2018). This is precisely why good DHA supply around pregnancy and breastfeeding is so important.

Hormonic Base: Folate and Zinc for Your Foundation

You get omega-3 from fish or algae oil. For the rest of your basic needs, Hormonic Base provides, among other things, folate and zinc, which according to the EFSA contributes to normal fertility, as well as vitamin D.

Discover Hormonic Base

How much omega-3 and from where

For general supply, about 250 to 500 milligrams of EPA and DHA per day are considered beneficial. If you are pregnant or planning to become pregnant, you should also aim for around 200 milligrams of DHA daily. A few points can help with implementation.

Through diet:Fatty seafish such as salmon, mackerel or herring once or twice a week provides plenty of EPA and DHA.
Fish oil or algae oil:Algae oil is the plant-based source of DHA and a good choice for vegetarians and vegans, without any mercury concerns.
Pay attention to purity:During pregnancy, purified oils or algae oil are advisable to keep exposure to pollutants low.
Be careful with blood thinners:Very high doses can slightly affect blood clotting; consult a doctor if you are taking medication or before surgery.

Omega-3 itself is not part of our formulas; you can best get it through fatty fish or a good algae oil. For the rest of the basic supply for fertility, ourHormonic Baseprovides, among other things, folate and zinc, which, according to the EFSA, contributes to normal fertility, as well as vitamin D. If you also want cycle-specific support, you will find myo-inositol and zinc in theCycle+ Formula. Both are intended as supplements, not as treatment.

And if you are unsure what is beneficial for your fertility, it is best to clarify this in afree initial consultationor with your gynecologist.

Unsure what makes sense for your family planning?

In a free 15-minute introductory call, one of our doctors will address your questions about fertility, cycles, and nutrients, with no obligation.

Secure your free initial consultation

Conclusion

Omega-3 is one of the most beneficial nutrients for fertility. The role of DHA in pregnancy is most strongly supported, for the normal development of the baby's brain and eyes, and for a lower risk of premature birth. The signals for conceiving itself are positive, but come from observational studies, so they are promising rather than proven. The best way to get omega-3 is through fatty fish or algae oil, in the target amount of 250 to 500 milligrams daily, plus around 200 milligrams of DHA during pregnancy.

Frequently Asked Questions about Omega-3 for Fertility

Does omega-3 help with getting pregnant?

In observational studies, women with good omega-3 intake had a higher chance of becoming pregnant per cycle, and in artificial insemination, higher omega-3 levels were associated with better outcomes. These are promising correlations, but not proof. Omega-3 is a useful component for those trying to conceive, not a guarantee.

How much omega-3 for fertility?

For general care, about 250 to 500 milligrams of EPA and DHA per day are considered beneficial. Those who are pregnant or planning to become pregnant should also pay attention to around 200 milligrams of DHA daily. Best obtained from fatty fish, purified fish oil, or algae oil.

Fischöl oder Algenöl bei Kinderwunsch?

Beide liefern die wichtigen Omega-3-Fettsäuren. Algenöl ist die pflanzliche DHA-Quelle, ideal für Vegetarierinnen und Veganerinnen, und umgeht die Quecksilberfrage. Fischöl sollte gereinigt sein, gerade in der Schwangerschaft. Wichtig ist vor allem, dass ausreichend DHA enthalten ist.

Ist Omega-3 in der Schwangerschaft wichtig?

Ja. Für DHA ist anerkannt, dass die Aufnahme durch die Mutter zur normalen Entwicklung von Gehirn und Augen des Kindes beiträgt, wofür rund 200 Milligramm DHA zusätzlich pro Tag genannt werden. Zudem senkte Omega-3 in einer großen Auswertung das Frühgeburtsrisiko. Eine gute DHA-Versorgung ist rund um Schwangerschaft und Stillzeit deshalb besonders wichtig.

Scientific Sources

Stanhiser, J. et al. (2022). Omega-3 fatty acid supplementation and fecundability. Human Reproduction, 37(5), 1037-1046. doi:10.1093/humrep/deac027
Chiu, Y.-H. et al. (2018). Serum omega-3 fatty acids and treatment outcomes among women undergoing assisted reproduction. Human Reproduction, 33(1), 156-165. doi:10.1093/humrep/dex335
Middleton, P. et al. (2018). Omega-3 fatty acid addition during pregnancy. Cochrane Database of Systematic Reviews, 11, CD003402. doi:10.1002/14651858.CD003402.pub3
European Food Safety Authority (EFSA) (2011). Scientific Opinion on the substantiation of health claims related to DHA and contribution to normal brain and eye development. EFSA Journal, 9(4), 2078.
Yang, K. et al. (2018). Effectiveness of Omega-3 fatty acid for polycystic ovary syndrome: a systematic review and meta-analysis. Reproductive Biology and Endocrinology, 16, 27. doi:10.1186/s12958-018-0346-x

About the Author

Lisa Maria Emmer

Founder · Physician · Hormonic

Lisa Maria Emmer is a doctor and co-founder of Hormonic. She combines clinical experience with an evidence-based perspective on women's health, micronutrients, and hormonal balance.

Note: This article is based on current guidelines and scientific work (as of 2026). It is for informational purposes only and does not replace medical advice, diagnosis, or treatment.

Schwangere Frau in Küche, Pflanzen und Lebensmittel im Hintergrund auf Küchenablage

FruchtbarkeitJul 24, 20267 min read

Nutrients in Pregnancy: What You Really Need

Folic acid, iodine, DHA, and iron: Which nutrients really matter during pregnancy, what you should supplement, and what you should avoid, medically explained.

Eizellqualität verbessern: Was wirklich funktioniert

FruchtbarkeitOct 24, 20248 min read

Improve Egg Quality: What Really Works

The quality of your eggs is one of the most important factors for fertility and directly impacts the chances of a successful pregnancy. Women are born with a limited egg reserve – around 1 to 2 mil...

Fehlende Nährstoffe bei Unfruchtbarkeit – was sagt die Forschung?

FruchtbarkeitMar 25, 20268 min read

Nutrient Deficiencies in Infertility – What Does Research Say?

Which micronutrients are most commonly deficient in women with infertility? The NHANES 2026 analysis provides clear data – we explain what it really means.

Cart

Omega-3 for Women Trying to Conceive: What Studies Show