Hormonal response
Testicular steroid output can respond within days in clinical use.
Protocol / Research Dosing Guide
HCG Dosage Guide: Reported Schedules, Reconstitution and Safety
An evidence-organized HCG reference separating approved clinical use from the source-reported research-community schedules that circulate online.
Last reviewed September 16, 202617 minute readResearch information only
Level 5 — Approved medicine in defined indicationsPrescription productResearch-community use is not approved
HCG Quick Start
HCG binds the same receptor as luteinizing hormone, which is why prescribing information uses it to drive testicular or ovarian signalling. Approved use is clinician-directed and indication-specific. The schedules discussed in research communities for testosterone support or post-cycle recovery are not the approved regimens and are not validated for that purpose.
Why researchers care
Testicular stimulation, fertility support and hormone-axis restart discussions
Class
Human chorionic gonadotropin, an LH-receptor agonist glycoprotein hormone
Route reported
Subcutaneous or intramuscular after reconstitution
Cycle length
Not established outside prescribed clinical courses
Regulatory status
FDA approved by prescription for defined fertility and hypogonadotropic indications
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HCG Dosing Protocol and Schedule
The supplied guide reports research-community amounts of roughly 250–500 IU given two to three times weekly, drawn from 5,000 IU vials, and separates fertility contexts from post-cycle discussion. Those figures are source-reported, not a recommendation from this page.
| Phase or study | Amount | Frequency / evidence |
|---|---|---|
| Approved clinical use | Set by the prescribing label and clinician | Regulatory |
| Reported community low range | 250 IU, two to three times weekly | Community reported |
| Reported community upper range | 500 IU, two to three times weekly | Community reported |
| Fertility contexts | Clinician-directed, monitored with hormone testing | Clinical |
| Rest period | Not established outside a prescribed course | Not established |
Only the prescribed clinical regimen carries regulatory support. Community IU figures are reported practice with no dose-finding trial behind them.
HCG Supplies Needed
Neutral research-material planning only. This does not establish an appropriate amount or route.
Research planning item
Exact labeled vial, read in IU
Research planning item
Bacteriostatic water at a measured volume
Research planning item
U-100 insulin syringes
Research planning item
Alcohol prep swabs
Research planning item
Sharps container
Research planning item
Refrigeration for the reconstituted vial
Research planning item
Written concentration label with the preparation date
HCG Reconstitution Calculator
Vial-format concentration math
Concentration
1 mg/mL
Draw volume
0.25 mL
U-100 units
25
Mathematical draws
20
Arithmetic only. The entered amount is not a recommendation and does not establish suitability.
Best Time to Take HCG: Morning or Night?
Morning or evening?
Not established. Reported schedules describe fixed weekly days rather than a time of day.
Every day or spaced?
Source-reported schedules space administrations two to three times weekly.
With food?
Not applicable to an injected product.
Missed amount?
No validated replacement procedure exists. Prescribed courses are adjusted by the treating clinician.
HCG Route Comparison
| Format | What is reported | Evidence limit |
|---|---|---|
| Subcutaneous | Most common in reported community practice | Not the same as the approved administration instructions |
| Intramuscular | Used in clinical settings and in some labels | Follow the specific product label |
| Oral or sublingual | Not a viable route for a glycoprotein hormone | Digestion destroys the molecule |
Routes and amounts are not interchangeable unless a verified study explicitly establishes a conversion.
HCG Half-Life and Dosing Frequency
| Measure | Finding | Evidence limit |
|---|---|---|
| Reported plasma half-life | Roughly 24–36 hours in published pharmacology | Varies by route and product |
| Terminal phase | Longer elimination tail reported after intramuscular use | Product specific |
| Frequency logic | The long half-life is the reason reported schedules space administrations across the week | Reported rationale |
| Community IU schedules | Not validated by a dose-finding trial | Not established |
HCG Dosage Chart
| Route | Amount | Frequency | Source | Human validation |
|---|---|---|---|---|
| Subcutaneous | 250 IU | Two to three times weekly | Community report | No |
| Subcutaneous | 500 IU | Two to three times weekly | Community report | No |
| Clinician directed | Per label | Per label | Regulatory | Yes |
Published study values describe those studies. Community-reported values are not validated dosing recommendations.
HCG Reconstitution Guide
Concentration: 1 mg/mL
| Entered amount | Volume | U-100 units |
|---|---|---|
| 0.25 mg | 0.25 mL | 25 units |
| 0.5 mg | 0.5 mL | 50 units |
| 0.75 mg | 0.75 mL | 75 units |
- 1.Confirm the total IU printed on the vial label.
- 2.Choose and record the bacteriostatic water volume, commonly 5 mL for a 5,000 IU vial.
- 3.Clean the stopper with an alcohol swab.
- 4.Add the liquid slowly down the vial wall.
- 5.Swirl gently until clear; never shake a protein solution.
- 6.Divide total IU by the added millilitres to get IU per mL. 5,000 IU in 5 mL is 1,000 IU/mL; in 2.5 mL it is 2,000 IU/mL.
- 7.Label the vial with the concentration and preparation date.
- 8.Refrigerate the reconstituted vial and keep it out of light.
Reconstitution does not establish identity, purity, sterility, stability, or an appropriate amount.
How HCG Works
Receptor target
HCG activates the LH/CG receptor on Leydig and granulosa cells.
HCG Human Trials and FDA Status
Current status · verified September 16, 2026
FDA approved by prescription for defined fertility and hypogonadotropic indications
- HCG is an approved prescription product with established clinical use in defined fertility and hypogonadotropic indications.
- Approved labeling defines route, indication and monitoring; research-community testosterone-support schedules sit outside that labeling.
- No dose-finding trial establishes the 250–500 IU community pattern for the purposes discussed online.
- Any hormone-axis intervention requires clinician supervision and laboratory monitoring.
Who Should Avoid HCG?
This is an evidence-gap and precaution list, not an approved prescribing label.
Hormone-sensitive cancers
Contraindicated in prescribing information
Precocious puberty
Contraindicated in prescribing information
Pregnancy
Not for use outside a supervised fertility protocol
Undiagnosed abnormal bleeding or endocrine disease
Requires diagnosis before any hormone intervention
Self-directed use without monitoring
Hormone effects cannot be judged without laboratory testing
HCG Side Effects, Risks and Safety
Injection-site reactionReported
Important limitation: Common with any subcutaneous product.
Headache, fatigue or mood changeReported
Important limitation: Documented in labeling.
GynecomastiaReported
Important limitation: Linked to raised estradiol from increased testicular output.
Ovarian hyperstimulationDocumented in fertility use
Important limitation: A recognized clinical risk requiring supervision.
Fluid retentionReported
Important limitation: Documented in labeling.
Long-term self-directed useUnknown
Important limitation: No safety dataset exists for unsupervised schedules.
HCG Timeline and Monitoring
Testing
Clinical courses are judged with hormone panels, not by symptoms alone.
Reported community windows
Multi-week blocks appear in reported practice without trial validation.
Stopping rules
Set by the treating clinician; no validated self-directed stopping rule exists.
HCG Benefits and Results: What the Evidence Shows
| Claim | Evidence level | What research shows | Important limitation |
|---|---|---|---|
| Fertility indications | Established | Approved labeling | Clinician directed |
| Hypogonadotropic hypogonadism | Established | Approved labeling | Clinician directed |
| Testicular size preservation | Reported in clinical literature | Context dependent | Requires supervision |
| Post-cycle recovery use | Not established | Community reported | No dose-finding trial |
HCG Storage and Handling
Unreconstituted vial
Store per the product label, typically cool and away from light.
Reconstituted vial
Refrigerate; labeling commonly limits use to a defined number of days.
Freezing
Not recommended for a reconstituted glycoprotein solution.
Appearance
Discard cloudy, discolored or particle-containing solution; appearance alone cannot confirm sterility.
HCG Troubleshooting
IU and mL do not agree
Recompute IU per mL from the label total and the exact liquid volume added.
Powder will not dissolve
Swirl gently and allow time; do not shake or warm aggressively.
Solution looks cloudy
Do not use it; seek qualified product guidance.
Unexpected symptoms
Stop and seek licensed clinical review; hormone products require supervision.
Missed administration
No validated replacement rule exists; a clinician adjusts a prescribed course.
HCG Comparisons
| Compound | Class or mechanism | Evidence | FDA status |
|---|---|---|---|
| HCG | LH-receptor agonist | Approved prescription indications | Clinician directed |
| Gonadorelin | GnRH analogue acting upstream | Different mechanism and duration | Not interchangeable |
| Kisspeptin-10 | Upstream GnRH stimulus | Mostly research context | Not interchangeable |
HCG Frequently Asked Questions
Is HCG a peptide?
It is a glycoprotein hormone, larger and more complex than the short peptides elsewhere in this library.
Is HCG FDA approved?
Yes, as a prescription product for defined fertility and hypogonadotropic indications.
Are the 250–500 IU schedules approved?
No. They are source-reported community practice.
How is IU per mL calculated?
Divide the total IU on the label by the millilitres of liquid added.
What does 5,000 IU in 5 mL give?
1,000 IU per mL, so 250 IU is 0.25 mL, or 25 units on a U-100 syringe.
How long does a reconstituted vial last?
Follow the product label; refrigerated use windows are limited.
Can HCG be taken orally?
No. It is destroyed by digestion.
Does HCG raise estradiol?
Increased testicular output can raise estradiol, which is why clinical use includes monitoring.
Is a rest period established?
Not outside a prescribed clinical course.
What does the calculator do here?
It performs concentration and volume arithmetic only; it does not recommend an amount.
Does this page give medical advice?
No. It is an educational reference.
Sources and Research
Coverage source
1. HCG dosing guide coverage source
Supplied coverage source for reported schedules and vial arithmetic; not primary evidence.
Open direct sourceRegulatory labeling
2. Chorionic gonadotropin prescribing information
Approved indications, contraindications and administration guidance.
Open direct sourcePublished pharmacology
3. Human chorionic gonadotropin pharmacology and LH-receptor activity
Published pharmacology of HCG signalling and elimination.
Open direct sourceMissing information flagged for review
- Validated community IU schedule: Not established
- Dose-finding evidence for testosterone-support use: Not established
- Validated cycle and rest period outside prescribed courses: Not established
- Long-term unsupervised safety data: Not established