Gonadorelin (GnRH)
Also known as: Gonadorelin, GnRH, Gonadorelin Acetate
Gonadorelin is a synthetic form of gonadotropin-releasing hormone (GnRH) studied for stimulating the pituitary release of LH and FSH. It is used in fertility research and to assess or support the hypothalamic-pituitary-gonadal axis.
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Mechanism of Action
Gonadorelin is identical to native GnRH, a decapeptide that binds GnRH receptors on anterior pituitary gonadotrophs. Pulsatile receptor activation stimulates the synthesis and release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which in turn drive gonadal steroidogenesis and gametogenesis. Pulsatile delivery sustains gonadotropin output, whereas continuous exposure desensitizes and downregulates the receptors, suppressing LH and FSH.
- Half-life
- Very short; approximately 2 to 10 minutes
- Administration Routes
- subcutaneous, intravenous
- Research Status
- Clinical
Reported Benefits
- Stimulates pituitary release of LH and FSH
- Supports endogenous testosterone or estrogen production via the gonadal axis
- Used to evaluate hypothalamic-pituitary-gonadal function
- May help maintain testicular function during research protocols
- Studied in fertility and ovulation-induction contexts
- Short action allows pulsatile dosing that mimics natural GnRH rhythm
Potential Side Effects
- Injection-site reactions
- Headache or flushing
- Nausea or abdominal discomfort
- Hormonal fluctuations with mood changes
- Rare hypersensitivity reactions
Common Dosing
Research-use only, not medical advice. Pulsatile research protocols reference small subcutaneous doses (often in the tens to low hundreds of micrograms) given several times per week or on a pulse schedule to preserve receptor sensitivity.
The dosing information above is aggregated from research literature and anecdotal community reports for educational purposes only. It is not a recommendation, prescription, or medical advice. Peptides are sold as research chemicals only and are not intended for human use.
Contraindications
- Hormone-sensitive tumors
- Known hypersensitivity to gonadorelin
- Pregnancy unless under specific medical supervision
HCG (Human Chorionic Gonadotropin)
A glycoprotein hormone produced in pregnancy that mimics luteinizing hormone, used clinically to stimulate gonadal function. It is studied to support testosterone production and fertility.
HMG (Human Menopausal Gonadotropin)
Human menopausal gonadotropin (menotropin) is a purified preparation of the pituitary gonadotropins FSH and LH, historically extracted from the urine of postmenopausal women. It is used clinically to stimulate gametogenesis and gonadal steroid production in fertility settings.
Triptorelin (GnRH)
Triptorelin is a long-acting synthetic GnRH agonist used clinically to suppress sex-hormone production after an initial flare. It is applied in prostate cancer, endometriosis, precocious puberty, and fertility protocols.
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Hypophysial responses to continuous and intermittent delivery of hypopthalamic gonadotropin-releasing hormone
1978
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The Pulsatile Gonadorelin Pump Induces Earlier Spermatogenesis Than Cyclical Gonadotropin Therapy in Congenital Hypogonadotropic Hypogonadism Men
2019
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Pulsatile GnRH or human chorionic gonadotropin/human menopausal gonadotropin as effective treatment for men with hypogonadotropic hypogonadism: a review of 42 cases
1998
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Use of pulsatile gonadotropin-releasing hormone (GnRH) in patients with functional hypothalamic amenorrhea (FHA) results in monofollicular ovulation and high cumulative live birth rates: a 25-year cohort
2022