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hCG

Human chorionic gonadotropin · Pregnyl · Novarel

A gonadotropin approved for ovulation induction and hypogonadotropic hypogonadism, supplied as a lyophilised powder and dosed in international units rather than by weight.

FDA approved. Approved or legitimately prescribed for at least one indication. Dose information below is reference material, not a recommendation — follow your prescriber and the product labelling.

At a glance

Category
Sexual Health
Half-life
~29 hours
Typical vial sizes
5,000 IU · 10,000 IU
Commonly cited dose
Varies widely
Frequency
varies by indication — see the FDA label
Routes
Subcutaneous · Intramuscular

Storage

Lyophilised (unmixed)
Store at room temperature 20-25C.
Reconstituted
Refrigerate at 2-8C after reconstitution and discard after 60 days, per the FDA label. Do not freeze or shake.

What people log it against

Outcomes users commonly track alongside this compound. Listing them is not a claim that it produces them.

  • Fertility protocol tracking
  • Hormonal axis tracking

References

Each source below establishes only the specific claim noted with it, last checked 2026-08-15. Dose ranges, frequencies and storage times reflect what circulating protocols commonly state and are not established by these references.

  1. FDA label — OVIDREL (choriogonadotropin alfa), DailyMed

    Pharmacokinetics after a single 250 mcg subcutaneous dose in healthy females: "t1/2 (h): 29 +/- 6", tmax 24 h (12-24), absolute bioavailability 0.4 +/- 0.1. Terminal half-life after IV dosing is 26.5 +/- 2.5 h. Establishes halfLifeHours 29.

  2. FDA label — CHORIONIC GONADOTROPIN for injection, DailyMed

    Source for the IU potency, reconstitution and storage guidance: 10,000 USP units per vial reconstituted with the supplied bacteriostatic water, "USE COMPLETELY WITHIN 60 DAYS AFTER RECONSTITUTION. REFRIGERATE AFTER RECONSTITUTION." This label states NO pharmacokinetic half-life, so the 29 h above comes from the recombinant label rather than from here.

Run your own numbers

This calculator does not cover hCG. hCG is measured in international units (IU), not by weight, so there is no milligram figure to convert and no fixed IU-to-mg conversion exists. Follow the reconstitution volume printed on your vial and its packaging — for the 10,000 IU presentation the FDA label specifies the supplied bacteriostatic water diluent. The calculator below is left available for mass-dosed peptides.
Your vial
mg

As printed on the vial label

mL

How much you inject into the vial

mcg

1000 mcg = 1 mg

Syringe size

Fills in a common vial size and the low end of commonly cited protocols. Always check against your own vial.

Draw this much
5units

on a 1 mL U-100 insulin syringe

Concentration
5 mg/mL
Volume
0.05 mL
Doses in this vial
40

Keep this vial. VialPal holds the concentration, counts down the doses left in it, and logs the ones you actually took.

VialPal does the arithmetic — it does not tell you what to take. Dose decisions belong between you and a qualified clinician.

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