← Library
Prescription-only medicine. This page is educational information only. Do not use without a licensed prescriber.
IndexedBuilt automatically from public databases on 2026-09-30. Not yet hand-reviewed by PLOBT.How this works →

Gonadorelin

FDA approved · Rx

Synthetic GnRH analog

Also known as: Factrel, GnRH, Gonadorelina, GnRH-I, Gonadorelinum, Fertagyl, LH-Releasing factor, Luforan, Lutrefact

Evidence score
92/ 100
Strong evidence

Strong, human-grade evidence

  • Regulatory standing. FDA-approved prescription medicine
  • Human trials. Backed by controlled human studies
  • Registered human trials. 1164 registered studies on ClinicalTrials.gov, most advanced Phase 4
  • 1 cited source. Includes primary / regulatory sources

Computed with the same four public criteria as every profile. The human-evidence grade on an indexed profile is set automatically and may change when it is hand-reviewed. It is not a safety score, not a purity rating, and not medical advice, and not a claim that this compound treats, cures, or prevents any condition.

What it is

Gonadorelin is a synthetic version of gonadotropin-releasing hormone (GnRH), a 10-amino-acid peptide made by the hypothalamus. It acts on the pituitary gland to trigger release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which in turn regulate the testes and ovaries.

What the evidence shows

Automatic summaryHuman trials

Under the brand Factrel, gonadorelin was approved for diagnostic testing of pituitary gonadotropin function, but current FDA marketing status could not be confirmed and the branded product appears to be discontinued in the US. Its hormonal effects on LH and FSH are well documented in humans, while off-label uses promoted in community settings have little direct supporting evidence, and the large trial count likely includes broader GnRH research.

Key facts

Molecular formula
C55H75N17O13
Molecular weight
1182.3 g/mol

Registered human trials

Published literature

Sources

Risks, side effects and study doses are only published on hand-reviewed profiles. Want this one reviewed, or spotted something wrong? Tell us.