Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 10/8/2025

HCG Dosage for Maintaining Fertility During TRT

Rationale and Mechanism

  • Exogenous testosterone administration suppresses the hypothalamic-pituitary-gonadal axis, resulting in decreased gonadotropin secretion, reduced intratesticular testosterone, and impaired spermatogenesis 1
  • The American Urological Association suggests that TRT alone can lead to oligospermia or azoospermia in up to 40% of patients, making it contraindicated for men seeking fertility 1
  • The recommended HCG dosage for maintaining fertility during TRT is 500-1,000 IU administered 2-3 times weekly, as suggested by The Journal of Urology 1

Important Considerations and Caveats

  • For men with hypogonadotropic hypogonadism seeking fertility, the European Association of Urology recommends gonadotropin therapy (HCG with or without FSH) as the standard treatment rather than TRT 2, 1
  • Combined HCG and FSH therapy provides optimal outcomes for fertility preservation, according to the European Urology guidelines 2

Alternative Approaches

  • The American Urological Association suggests that for men with secondary hypogonadism planning fertility in the near future, gonadotropin therapy alone (without TRT) may be preferable 1
  • If TRT must be discontinued to restore fertility, recovery of spermatogenesis may take months or even years, as reported by The Journal of Urology 1

Regaining Fertility While on Testosterone Replacement Therapy

Understanding the Problem

  • Testicular atrophy (shrinkage) can occur in patients on TRT, as reported by the New England Journal of Medicine 3
  • Fertility is greatly compromised during TRT because of down-regulation of gonadotropins, according to the New England Journal of Medicine 3

Treatment Options: A Hierarchical Approach

  • The addition of HCG to ongoing TRT can help re-establish or maintain spermatogenesis in hypogonadal men, as noted in the New England Journal of Medicine 3
  • Mimicking LH action directly on testicular Leydig cells with HCG can maintain intratesticular testosterone levels necessary for spermatogenesis, as reported in the New England Journal of Medicine 3

REFERENCES

← Return to Home