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HomeCompoundsHuman Chorionic Gonadotropin

Human Chorionic Gonadotropin (HCG)

Anti-estrogen & SERM

HCG

HCG mimics LH and maintains testicular production during a cycle. Used to prevent testicular atrophy (250-500 IU 2×/week on-cycle) or as a pre-PCT blast (2000 IU EOD × 3 weeks). Indispensable for long cycles.

Half-life

24–36 heures

Detection

2–3 semaines

Injectable

Dosages

Beginner500 UI × 2/sem
Intermediate500–1000 UI × 2/sem
Advanced1000–2000 UI × 2/sem
FemaleMedical use only

Frequency : 2-3× / week

Effects

  • Testicular maintenance during cycle
  • Facilitates HPTA restart
  • Maintains fertility
  • Increases endogenous testosterone

Side effects

  • Increased aromatization (↑ estrogen)
  • Breast sensitivity
  • Mild water retention
  • LH desensitization if overdosed

Support supplements

AI (during use to manage estrogen)Nolvadex or Clomid (post-HCG)

Synergies & stacks

NolvadexClomidAI

Avoid

  • Continuous use > 4-6 weeks (desensitization)
  • Post-cycle without a SERM
  • Excessive doses

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.

Sources

Studies and scientific publications this guide relies on.

  1. Coviello AD, Matsumoto AM, Bremner WJ, et al. (2005). Low-dose human chorionic gonadotropin maintains intratesticular testosterone in normal men with testosterone-induced gonadotropin suppression. Journal of Clinical Endocrinology & Metabolism. doi: 10.1210/jc.2004-0802

    RCT chez 29 hommes sous 200 mg/sem testostérone énanthate : hCG 250 UI tous les deux jours maintient la testostérone intratesticulaire proche du baseline (-7 %) vs effondrement (-57 %) sous testostérone seule. Effet dose-réponse mesuré 125 / 250 / 500 UI.

  2. Depenbusch M, von Eckardstein S, Simoni M, et al. (2002). Maintenance of spermatogenesis in hypogonadotropic hypogonadal men with human chorionic gonadotropin alone. European Journal of Endocrinology. doi: 10.1530/eje.0.1470617

    Étude prospective chez 26 hommes hypogonadotropes : hCG seule (sans FSH) suffit à maintenir une spermatogenèse établie pour la majorité — démontre que l'hCG mime fonctionnellement la LH au niveau des cellules de Leydig.

  3. Liu PY, Baker HW, Jayadev V, et al. (2009). Induction of spermatogenesis and fertility during gonadotropin treatment of gonadotropin-deficient infertile men: predictors of fertility outcome. Journal of Clinical Endocrinology & Metabolism. doi: 10.1210/jc.2008-1648

    Méta-analyse individuelle (75 hommes hypogonadotropes) : induction de spermatogenèse sous hCG 1500-2500 UI 2-3× / sem ± FSH — succès chez la majorité, prédicteurs (volume testiculaire de départ, type de déficit) identifiés.

  4. Rahnema CD, Lipshultz LI, Crosnoe LE, et al. (2014). Anabolic steroid-induced hypogonadism: diagnosis and treatment. Fertility and Sterility. doi: 10.1016/j.fertnstert.2014.02.002

    Revue clinique : place de l'hCG comme amorce pré-PCT pour réveiller les cellules de Leydig en cas d'atrophie marquée, transition vers les SERM, distinction nette entre hCG et SERM dans la stratégie de relance.

  5. Anawalt BD (2019). Diagnosis and Management of Anabolic Androgenic Steroid Use. Journal of Clinical Endocrinology & Metabolism. doi: 10.1210/jc.2018-01882

    Revue clinique : sous androgène exogène, l'arrêt de la signalisation hypothalamo-hypophysaire entraîne une atrophie testiculaire ; l'hCG on-cycle limite cette atrophie et peut faciliter la récupération ultérieure, sans modifier la suppression centrale.

Related guides

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Testosterone-only cycle

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HCG on cycle and PCT

TRT protocol guide

TRT vs steroid cycle

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AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.