Ingredient guide · Ingredient reference

Melatonin during IVF: higher follicular levels did not prove benefit

A dose-finding pilot found no significant pregnancy or live-birth difference and was too small to exclude a useful effect.

Read the evidence ↓

Supplement Science Insights Editorial Team

Published September 23, 2026

The study and its comparison

One hundred sixty women having their first IVF or ICSI cycle were randomized to placebo or one of three melatonin regimens during ovarian stimulation. Clinical pregnancy was the primary outcome. [1]

Pregnancy and live-birth rates did not significantly differ among groups. Egg and embryo measures also did not improve, despite about ninefold higher follicular-fluid melatonin in the highest-dose group. [1]

What the finding establishes

The investigators emphasized limited statistical power. A null pilot cannot establish equivalence, but the concentration rise is not proof of reproductive benefit either. Funding and conflicts were not established from the abstract. This study does not provide a personal fertility-treatment dose or support replacing established care. [1]

A hypothetical distinction

Imagine more of a compound reaches follicular fluid while pregnancy rates remain uncertain. Exposure and successful treatment are different endpoints.

Interpretation checklist — Melatonin during IVF
DetailInterpretation
Measured outcomeKeep the endpoint specific
Study preparationNot every retail product
Remaining uncertaintyNot resolved by a mechanism
Melatonin during IVF: higher follicular levels did not prove benefit — original article outline diagram
Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

  1. Melatonin in Assisted Reproductive Technology: A Pilot Double-Blind Randomized Placebo-Controlled Clinical Trial.
    Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.