HCG
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Acerca de HCG
Human Chorionic Gonadotropin (HCG) is a naturally occurring glycoprotein hormone composed of alpha and beta subunits. HCG acts as a luteinizing hormone (LH) analog, stimulating Leydig cells and supporting intratesticular testosterone production. Extensively studied in the context of male fertility preservation, hormonal support during testosterone replacement protocols, and reproductive endocrinology research.
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Published Study Findings on HCG
Detailed Research & Citations
In-depth findings from peer-reviewed preclinical and clinical studies
Human Chorionic Gonadotropin (HCG) is a naturally occurring glycoprotein hormone composed of α and β subunits (237 amino acids total, ~36.7 kDa). As a luteinizing hormone (LH) analog, HCG directly stimulates Leydig cells to produce intratesticular testosterone, making it a critical compound in reproductive endocrinology and male hormonal support research.
Intratesticular Testosterone Maintenance
HCG acts as an LH analog, binding to the LH/CG receptor on Leydig cells to stimulate testosterone biosynthesis. Studies in healthy men showed that low-dose HCG (250–500 IU every other day) maintained intratesticular testosterone within the normal range even during exogenous testosterone administration.
Journal of Clinical Endocrinology & Metabolism (2005)Dose-Response Relationship
Coviello et al. demonstrated a clear dose-response between HCG dose and intratesticular testosterone levels. While exogenous testosterone alone reduced ITT by 94%, concurrent HCG at 125, 250, and 500 IU every other day restored ITT in a dose-dependent manner.
Journal of Clinical Endocrinology & Metabolism (2005)Spermatogenesis Preservation
Retrospective clinical analyses demonstrated that concurrent low-dose HCG (500 IU EOD) with testosterone replacement therapy preserved sperm density and prevented azoospermia. Multiple successful pregnancies were achieved by patients on combined TRT + HCG protocols.
The Journal of Urology (2012)Testicular Volume Maintenance
HCG supplementation during testosterone therapy prevents the testicular atrophy typically associated with exogenous androgen use. By maintaining LH receptor stimulation, HCG preserves Leydig cell function and testicular volume.
The Journal of Urology (2012)Hypogonadotropic Hypogonadism Treatment
HCG is a first-line treatment in male hypogonadotropic hypogonadism, stimulating endogenous testosterone production and spermatogenesis. In combination with FSH, HCG therapy can restore fertility in men with congenital or acquired gonadotropin deficiency.
International Journal of Endocrinology (2019)Established Clinical Safety Profile
HCG has decades of clinical use with a well-characterized safety profile. Common dose-related effects include injection site reactions and transient estradiol elevation. Monitoring of hematocrit and estradiol is recommended during extended use protocols.
The Journal of Urology (2018)View All 4 Sources
- Low-Dose Human Chorionic Gonadotropin Maintains Intratesticular Testosterone in Normal Men with Testosterone-Induced Gonadotropin Suppression
- Human Chorionic Gonadotropin Co-Administration with Human Menopausal Gonadotropin and Testosterone: Semen Parameters
- A Review of the Use of Human Chorionic Gonadotropin for the Treatment of Male Hypogonadism
- Testosterone Replacement Therapy — Current Trends and Future Directions
All findings above are sourced from peer-reviewed journals for educational reference. This product is for research purposes only — not for human consumption. Preclinical results may not translate to human outcomes.
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