HCG

HCG is a clinically established gonadotropin hormone studied for fertility support, testicular function, and testosterone maintenance or recovery.

Profile · 01

Overview

Human chorionic gonadotropin (HCG) is a glycoprotein hormone that mimics luteinizing hormone by binding LH receptors in the gonads. Unlike many entries in the peptide library, HCG does have FDA-approved medical uses and a substantial human clinical literature base.

The source protocol centers on a three-times-weekly maintenance pattern designed to preserve testicular function, support fertility, and maintain intratesticular testosterone during or after exogenous-androgen exposure.

At a Glance

Goal
Support testicular function, fertility preservation, and endogenous testosterone signaling
Categories
Hormonal SupportFertility PreservationTestosterone RecoveryTRT Adjunct
Synergistic
Testosterone (TRT) · Gonadorelin · Enclomiphene · Estradiol management when appropriate
Profile · 02

Protocol

Standard three-times-weekly maintenance protocol using a consistent per-injection dose.

Reconstitute
Add 2.0 mL bacteriostatic water to a 5,000 IU vial for 2,500 IU/mL concentration
Typical dose range
250-1,000 IU per injection, 3 times weekly
Start
500 IU per injection, 3 times weekly
Target
500 IU per injection, 3 times weekly (1,500 IU weekly total)
Frequency
3 times weekly on non-consecutive days (subcutaneous)
Cycle Length
8-16 weeks or as directed by the protocol goal
Timing
Use consistent injection days such as Mon/Wed/Fri and rotate sites
Route
Subcutaneous
Cycle
8-16 weeks on, goal-dependent off period

Inject three times weekly on non-consecutive days. HCG has a much longer half-life than endogenous LH, which is why a non-daily schedule can still provide sustained gonadal stimulation. Estradiol monitoring matters because HCG can increase aromatase-driven estrogen production in some users.

Dose progression

Weeks 1-12
500 IU · 20 units (0.20 mL)

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Science · 01

How HCG works.

HCG acts at LH receptors in Leydig cells and provides sustained stimulation of endogenous testosterone production because its half-life is far longer than native LH. It also helps preserve or restore intratesticular testosterone, which matters for fertility and testicular-volume goals.

The human evidence base here is stronger than for most research peptides. Clinical literature supports fertility, hypogonadotropic hypogonadism, and TRT-adjunct applications, especially when preserving spermatogenesis or reducing testicular atrophy is a major goal.

Science · 02

Effects

Observations from clinical or preclinical literature.

Supports intratesticular testosterone and spermatogenesis during TRT or recovery protocols
May help prevent or reverse testicular atrophy associated with exogenous androgen use
Has robust clinical support in fertility and hypogonadism-related contexts
Can support downstream steroid production beyond testosterone alone
Estradiol can rise due to increased aromatase activity
Mild injection-site irritation, acne, oily skin, or temporary testicular aching may occur
Science · 03

Caution

Use caution in hormone-sensitive cancers such as prostate or breast cancer
Pregnancy-related use falls outside this male-focused page and requires direct medical supervision
Monitor estradiol because HCG can meaningfully increase estrogen production in some individuals
Consult a qualified healthcare provider before use if you have chronic medical conditions or are on hormone therapy

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Lifestyle · 01

CoFactors

Zinc
Supports testosterone synthesis and immune function.
Vitamin D
Relevant to hormonal balance and reproductive health.
Magnesium
Supports enzymatic processes involved in steroidogenesis.
DIM
Often discussed where estradiol metabolism is a practical concern.
Lifestyle · 02

Life Factors

Complementary strategies for best outcomes.

Prioritize 7-9 hours of sleep because reproductive hormones are sleep-sensitive
Maintain adequate dietary fat, protein, and micronutrient sufficiency to support steroidogenesis
Use resistance training but avoid chronic excessive endurance stress
Limit heavy alcohol use and reduce unnecessary heat exposure to the testes where fertility is a goal
Lifestyle · 03

Metrics

Day-to-day metrics worth tracking through the protocol.

  1. Total and free testosterone response - monitor labs and symptom changes
  2. Estradiol-related symptoms - watch water retention, breast sensitivity, or mood changes
  3. Testicular volume and function - useful where fertility or atrophy prevention is the target
  4. Injection-site reactions - note redness, swelling, or discomfort
Lifestyle · 04

Labs

Baseline and periodic bloodwork to monitor systemic health during the protocol.

Total and free testosterone
Primary outcome markers for gonadal response.
Estradiol (E2)
Critical to monitor because HCG can raise aromatase-driven estrogen.
LH and FSH
Useful baseline context for broader reproductive-axis interpretation.
CBC (Complete Blood Count)
Monitor general health and hematologic context during hormonal protocols.
CMP (Comprehensive Metabolic Panel)
Assess broader systemic function during the protocol.
Semen analysis
Especially relevant if fertility preservation is the primary goal.
Calculators · 01

Supplies Calculator

Estimates assume the schedule defined for this peptide.

Length
Vial size
Bac. water
Syringe
Vials
0 × 5000 IU each…
Syringes
0
Bac. water
0 mL
Swabs
02 per syringe
Calculators · 02

Dose Calculator

Dose Calculator

Vial
Bac. water
Syringe
Dose
Concentration
0IU/mL
Volume per dose
0mL
…
Practice · 01

Preparation

Careful technique preserves potency. Solution should be clear — do not shake.

  1. Allow vial to reach room temperature for 15–20 minutes before reconstitution.
  2. Draw the chosen bacteriostatic water volume with a sterile syringe.
  3. Inject slowly down vial wall; avoid foaming.
  4. Gently swirl/roll until dissolved (do not shake).
  5. Label with reconstitution date and refrigerate at 2–8 °C (35.6–46.4 °F), protected from light.
  6. Use within 30 days; discard any unused solution after 30 days.
Practice · 02

Technique

General subcutaneous guidance from clinical best-practice resources.

Clean the vial stopper and injection site with alcohol and allow them to dry fully
Pinch a fold of skin and insert the needle at 45-90 degrees into subcutaneous tissue
Do not aspirate for subcutaneous injections; inject slowly and steadily
Wait several seconds before withdrawing the needle, then rotate sites systematically
Discard used syringes immediately in a sharps container

Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.

Practice · 03

Storage

Lyophilized
Store at room temp in dry, dark conditions; minimize moisture exposure.
Reconstituted
Refrigerate at 2–8 °C (35.6–46.4 °F); avoid freeze–thaw cycles. Discard reconstituted vials after 30 days.

Notes

Allow vials to reach room temperature before opening to reduce condensation uptake.
Reference · 01

Notes

Use a new sterile insulin syringe for each injection and dispose of it safely
Consistent injection days are more useful here than chasing a perfect hour of day
Estradiol monitoring matters because HCG can increase aromatase-driven estrogen production
This page reflects a clinically established hormone, but dosing still needs individualized medical context
PepTribe is an educational platform. This information is for research and learning purposes only and is not medical advice.
Reference · 02

References

  1. NCBI Bookshelf
    HCG structure, function, and receptor biology overview.
    https://www.ncbi.nlm.nih.gov/books/NBK532950/
  2. Seminars in Reproductive Medicine
    HCG pharmacokinetic and pharmacodynamic discussion.
    https://pubmed.ncbi.nlm.nih.gov/11389057/
  3. JCEM
    Coviello et al., low-dose HCG maintaining intratesticular testosterone in men.
    https://pubmed.ncbi.nlm.nih.gov/15562020/
  4. Translational Andrology and Urology
    hCG for hypogonadal male infertility review.
    https://pmc.ncbi.nlm.nih.gov/articles/PMC6087849/
  5. CDC
    Subcutaneous injection route guidance.
    https://www.cdc.gov/vaccines/hcp/admin/downloads/YCTS-VaxAdmin-Subcut-injection.pdf
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