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Gyna

Fertility supplements

Do fertility supplements work, and which are evidence-based?

The short answer

Folic acid earns its place in your preconception routine, but not for the reason the bottle implies. Its established job is helping prevent serious birth defects of your baby's brain and spine (neural-tube defects), not making you conceive faster. For the fertility antioxidants, a Cochrane review searched through September 2019 and found the evidence low or very low certainty. And evidence for one ingredient doesn't tell you a blend works.

High confidence Sources are linked. Not yet reviewed by a clinician.

How we check answers

What can I do with this?

Keep the reason for each product attached to the evidence. Folic acid has an established preconception role in helping prevent neural-tube defects, not in making conception faster.

A possible result for one antioxidant doesn't show that a multi-ingredient blend works.

But does this apply to me?

The antioxidant trials included women already attending fertility clinics. They don't show how well the results carry over to someone trying without a clinic, and the review can't cover research published after September 2019.

Care and safety

When should I bring in a clinician?

Products, ingredients and study methods varied, live-birth evidence was very uncertain, and side effects were poorly reported. Take everything you're using to your clinician before pregnancy, herbal supplements included, and ask about safety in pregnancy specifically.

Understand the answer

So what does this mean for me?

What does the research actually say?

Cochrane searched through September 2019 and pooled 63 randomized trials covering 7,760 women attending fertility clinics. Products, ingredients and methods varied.

The live-birth evidence was very uncertain, and side effects were poorly reported. That doesn't establish a general fertility benefit for antioxidants or a proprietary blend.

How does this compare with the official guidance?

The professional and health-authority sources support folic acid before pregnancy for helping prevent neural-tube defects. That is a different outcome from conceiving faster.

ACOG's pre-pregnancy guidance also supports reviewing every nutritional and herbal supplement, and its pregnancy safety, with a clinician.

Why is this our answer?

Four sources sit behind this answer: one Cochrane systematic review and guidance from ASRM, ACOG and the CDC. The antioxidant evidence is low or very low certainty, and side effects were poorly reported.

Sources for each main claim

What else are you wondering?

Explore all fertility supplements questions

Check the evidence

How sure can I be?

See the full evidence snapshot and sources

Evidence snapshot

The same fields appear on every Gyna answer, including when the research did not report something reliably.

Question and decision
Do fertility supplements work, and which are evidence-based? Keep birth-defect prevention, fertility outcomes, individual ingredients and blends separate.
Who was studied
The antioxidant review covers women attending fertility clinics; folic-acid guidance covers people planning pregnancy.
What was compared
Many antioxidant products and ingredients across varied trials. No one blend or universal fertility dose is established here.
Outcome measured, and over what period
Neural-tube-defect prevention is separate from conception and live birth. The review searched fertility trials through September 2019.
Kinds of evidence included
One Cochrane systematic review plus three professional or health-authority guidance pages.
Studies and participants
Cochrane pooled 63 randomized trials covering 7,760 women.
What the evidence shows
Folic acid has an established role in neural-tube-defect prevention, not faster conception. Fertility-antioxidant evidence was low or very low certainty.
Consistency and disagreement
Products, ingredients and methods varied; evidence for one ingredient cannot establish that a blend works.
Confidence in this answer
High confidence for folic acid preventing neural-tube defects; low to very low for fertility antioxidant benefits.
Strength of the sources
Cochrane synthesis for antioxidant trials and authority guidance for folic acid and pre-pregnancy supplement review.
Review status
Sources are linked. Not yet reviewed by a clinician.
Who this does and does not describe
The antioxidant evidence comes from fertility-clinic populations and may not carry over unchanged to people trying without treatment.
Harms, trade-offs and when to seek care
Side effects were poorly reported. Review every nutritional and herbal supplement for pregnancy safety with a clinician.
Last searched, and the records behind this
Last evidence search 2026-09-02. The source links are listed below.

Sources

Open the original guidance or study rather than taking our summary on trust.

  1. Antioxidants for female subfertility (PLS: Vitamins and minerals for subfertility in women)

    Cochrane · 27 August 2020 (CD007807.pub4)

  2. Optimizing Natural Fertility (patient education fact sheet)

    ASRM / ReproductiveFacts.org · Revised 2023

  3. Prepregnancy Counseling (Committee Opinion No. 762)

    ACOG · January 2019; Reaffirmed 2024

  4. About Folic Acid

    CDC · Last reviewed May 20, 2025

How we looked, and what we found

We searched the listed sources through September 2, 2026. The Cochrane review's own search ended in September 2019, so this answer states that date instead of making the review sound current.

The three authority pages supply the pre-pregnancy and safety boundary.

Who wrote this, and when will we revisit it?

Written by Gyna's evidence team from the sources listed on this page. The last evidence search was September 2, 2026.

Recheck this answer when the cited Cochrane review or pre-pregnancy guidance changes.

Last updated
2026-09-09

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