What is HCG and why is it used with TRT?
Last updated: January 2026
Quick Answer
HCG (human chorionic gonadotropin) mimics luteinizing hormone to keep the testes functioning during TRT. Without HCG, the testes shrink and stop producing sperm because exogenous testosterone shuts down natural production. HCG preserves testicular size, fertility, and intratesticular testosterone.
What is HCG and why is it used with TRT
HCG (human chorionic gonadotropin) mimics luteinizing hormone to keep the testes functioning during TRT. Without HCG, the testes shrink and stop producing sperm because exogenous testosterone shuts down natural production. HCG preserves testicular size, fertility, and intratesticular testosterone.
Understanding TRT medications helps you have informed conversations with your provider about your treatment protocol. Testosterone cypionate is the most commonly prescribed form, but other medications play important supportive roles.
Key Facts
- Testosterone cypionate is the gold standard for TRT in the US
- HCG helps preserve testicular function and fertility during TRT
- Anastrozole manages estrogen levels when they rise too high
- Enclomiphene is an alternative that boosts natural testosterone production
- Most protocols include testosterone plus one or more ancillary medications
Learn more about this medication: Hcg Complete Guide
Related Questions
Does TRT affect fertility?
Yes, TRT suppresses natural testosterone production and significantly reduces sperm count, often to zero. This is reversible in most men but recovery takes 6-12+ months after stopping. Men wanting children should use fertility-preserving protocols with HCG or enclomiphene alongside (or instead of) testosterone.
What medications are used for TRT?
The most common TRT medication is testosterone cypionate (weekly or biweekly injection). Other options include testosterone enanthate, testosterone propionate, HCG (for fertility preservation), enclomiphene (oral SERM to boost natural production), and anastrozole (aromatase inhibitor for estrogen management).