Gonadorelin GnRH Replacement
A synthetic GnRH (gonadotropin-releasing hormone) analogue for HPG-axis support and fertility preservation.
Book Free ConsultationCall 310.299.4444What Gonadorelin actually is
Gonadorelin is synthetic gonadotropin-releasing hormone (GnRH) — the decapeptide produced by hypothalamic neurons that stimulates pituitary release of LH and FSH. It has historical FDA approval for diagnostic use in evaluating hypothalamic-pituitary-gonadal function.1
In men on testosterone replacement therapy (TRT), exogenous testosterone suppresses endogenous LH/FSH and consequently testicular function — including testicular volume and spermatogenesis. Gonadorelin (or hCG) maintains the testicular axis during TRT, preserving fertility and testicular function.2
At Luxbae, Gonadorelin is prescribed and supervised by Dr. Ernst von Schwarz, MD, PhD after a complimentary medical consultation.
Mechanism — Pulsatile GnRH replacement
Replaces endogenous GnRH pulse at the pituitary, maintaining LH/FSH output and downstream testicular function.1
What the research shows
Fertility preservation on TRT. Maintains spermatogenesis during testosterone replacement.2
Testicular volume. Prevents the testicular atrophy seen on TRT monotherapy.
HPG axis maintenance. Keeps the axis responsive rather than fully suppressed.
Side effects: Mild injection-site reactions, occasional headache, rare gynecomastia.
FDA note: Previously FDA-approved for diagnostic use; current adult fertility-preservation use is largely compounded and prescribed under physician supervision.
Gonadorelin FAQ
Gonadorelin vs hCG for fertility?
Different mechanisms. Gonadorelin acts at the pituitary; hCG acts at the testis directly.
How often do I inject?
Typically 2–3×/week or daily depending on protocol.
References
- Schally AV, Arimura A, Baba Y, et al. Isolation and properties of the FSH and LH-releasing hormone. Biochem Biophys Res Commun. 1971;43(2):393-399.
- Lo EM, Rodriguez KM, Pastuszak AW, Khera M. Alternatives to Testosterone Therapy: A Review. Sex Med Rev. 2018;6(1):106-113.
- Hsieh TC, Pastuszak AW, Hwang K, Lipshultz LI. Concomitant intramuscular human chorionic gonadotropin preserves spermatogenesis in men undergoing testosterone replacement therapy. J Urol. 2013.