Tracking HCG With TRT: Dosing, Frequency, and What to Log
Matt · May 11, 2026
HCG (human chorionic gonadotropin) is commonly added to TRT protocols to keep the testes stimulated while exogenous testosterone is shutting down natural LH and FSH. Most users run 250–500 IU subcutaneously, two or three times per week, and log dose, day, injection site, and any changes in mood, libido, or testicular size over time.
Why people add HCG to TRT
When you start testosterone replacement, your pituitary stops sending the LH signal that tells your testes to produce testosterone and sperm. Over months, that can lead to testicular atrophy and reduced fertility. HCG mimics LH, so the testes stay "online" even while you're on exogenous T.
Common reasons users report adding HCG:
- Maintaining testicular size and that "full" feeling
- Preserving fertility while on TRT (for now or later)
- Some users say it helps with libido and mood beyond what testosterone alone gives them
It's worth saying clearly: HCG isn't a guarantee of fertility, and protocols vary widely. Talk to your prescribing doctor before adding it, especially if pregnancy is a near-term goal — many men benefit from a semen analysis as a baseline.
Typical dosing patterns
There's no single "correct" HCG protocol, but a few common patterns show up in TRT communities and clinics:
- 250 IU twice per week — often paired with twice-weekly testosterone injections (same days)
- 500 IU twice per week — for users who feel little from the lower dose
- 150–200 IU every other day — smoother levels, less peak/trough
- Higher doses for fertility restoration — sometimes 1000–1500 IU 2–3x/week, usually under a fertility-focused doctor
Reconstituted HCG is fragile. Most users mix with bacteriostatic water and refrigerate, using the vial within 30–60 days. Logging your reconstitution date is helpful — potency does drop over time.
What to track
If you're running HCG, the patterns that emerge over weeks of logs are more useful than any single data point. In Trace, many users track:
- Dose and day for both testosterone and HCG so you can see the cadence
- Injection site — HCG is small-volume subQ, and rotating sites helps avoid lumps
- Testicular size or fullness — a quick subjective note works fine
- Libido, mood, energy — these often shift before bloodwork does
- Estradiol — HCG can raise E2 by stimulating testicular aromatase
- Reconstitution date of the current vial
If fertility is the goal, semen analyses every few months are the real measurement — log the dates and results alongside your protocol so cause and effect become clearer.
Trace keeps all of this on-device with Face ID, which matters because hormone protocols are sensitive personal data and most people don't want them sitting in a cloud spreadsheet.
Frequently Asked Questions
Does HCG raise estrogen?
Often yes. HCG stimulates the testes to produce testosterone and aromatize some of it to estradiol, so users sometimes notice estrogen-related side effects after adding it. Many people retest E2 a few weeks in.
Can I run HCG without testosterone?
Some men use HCG as a monotherapy to boost natural testosterone production, especially those trying to preserve fertility or come off TRT. It's a different protocol with its own tradeoffs — definitely a conversation for your doctor.
How long does reconstituted HCG last?
Most sources suggest 30–60 days refrigerated, though some users report longer with proper storage. Potency degrades gradually rather than failing all at once, so logging your mix date helps you spot when a vial may be losing strength.