HCG Protocol

Dosing & Research

Last Updated: September 4, 2026

Also known as: Human Chorionic Gonadotropin, Pregnyl, Ovidrel

Testosterone stimulation, Fertility and ovulation induction, Leydig cell function studies, Corpus luteum maintenance

Half-Life

24–36 Hours

Administration

Subcutaneous

Frequency

Variable

How It Works

Glycoprotein hormone structurally similar to LH. Binds LH receptors on Leydig and granulosa cells for steroidogenesis.
Testosterone stimulation
Fertility and ovulation induction
Leydig cell function studies
Corpus luteum maintenance

Dosing Structure

Dose

1000–5000 IU per injection (approximately 17–85 mcg)

Frequency

Variable

Notes

Used in reproductive hormone research. Typical cycles: 3–4 weeks on with breaks based on recovery markers. Conversion: 1 IU HCG ≈ 0.017 mcg.

Example Protocols

Dose: 1000–5000 IU per injection (approximately 17–85 mcg)

Frequency: Variable

Duration: Not listed

Off Period: Not listed

Calculate dosing →

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Protocol Notes

•

Used in reproductive hormone research.

•

Typical cycles: 3–4 weeks on with breaks based on recovery markers.

•

Conversion: 1 IU HCG ≈ 0.017 mcg.

Research & Studies

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