hCG
Human chorionic gonadotropin. We read all 60 studies. The protocol is below.
Free — puts hCG on your decision board.
Everything you need to start: dose, sourcing, safety, our verdict.
One purchase · yours forever
Built from 60 cited studies.
- you're on TRT and want to keep your testicles working and your fertility intact
- you're running a structured PCT and need the real protocol, not Reddit folklore
- you're going through IVF and your RE put it on the calendar
- **dose orientation** — TRT testicular maintenance is **typically 250–500 IU 2–3×/week sub-Q** (Coviello 2005 PMID 15728198 used 125–500 IU EOD in the canonical paper); IVF/ovulation trigger is **a single 5,000–10,000 IU IM dose**; PCT is **500–1,500 IU EOD for 2–3 weeks**. The hCG diet's '125 IU/day' is a different (debunked) use case
- **you came here for post-cycle therapy (PCT)** — the protocol shape is 500–1,500 IU EOD for 2–3 weeks. For most readers, oral [enclomiphene](/peptides/enclomiphene) at 12.5 mg/day for 4–6 weeks is the cleaner HPG-axis recovery path — no injections, longer half-life, lab monitoring stays the same
- you're considering the "hCG diet" — the FDA already warned, it's still a scam
- you have hormone-sensitive cancer or undiagnosed gynecological bleeding
- **you refuse to monitor estradiol** — hCG drives intratesticular testosterone, which aromatizes; gynecomastia, water retention, and mood swings track elevated E2. **Get baseline + 6-week E2** if you're using it chronically for TRT support
- Facial or scalp hyperpigmentation that doesn't fade after stopping for 2–4 weeks.
- Persistent nausea on repeated use.
- Zero response to 2–3 attempts at proper dose (one of these — it's not for everyone).
What it is.
hCG is human chorionic gonadotropin — a glycoprotein hormone produced by the placenta during pregnancy. It binds the LH receptor (luteinizing hormone receptor), which is why it's used clinically to mimic an LH signal. In men, that signal tells the testes to make testosterone and maintain spermatogenesis. In women, it triggers ovulation.
It's been on the market for decades, originally extracted from the urine of pregnant women (Pregnyl, Novarel) and now also produced as a recombinant version (Ovidrel). indications include female infertility (triggering ovulation in IVF), male hypogonadotropic hypogonadism, and prepubertal cryptorchidism.
In the men's health and TRT world, hCG has a specific role: maintaining testicular size, function, and fertility in men on exogenous testosterone, where natural LH is suppressed. It's also used as a post-cycle therapy (PCT) agent to restart endogenous production. The discredited "hCG diet" of the 2010s is a separate, unrelated story.
TL;DR. 30-second version.
The compressed verdict — what hCG actually is, what the human evidence shows, and the watch-for in three bullets. Locked.
Get the report · $19 ↓Mechanism.
How the molecule actually works — receptor profile, downstream signaling, what to expect mechanistically.
Get the report · $19 ↓Evidence. What we actually know in humans.
The trial breakdown — phase, n, primary endpoint, who funded, what hit, what didn't.
Get the report · $19 ↓Dose. The actual protocol.
The specific protocol — dose, titration schedule, cycle pattern, frequency, route.
Sourcing. Where the cohort actually buys.
Sourcing breakdown — vendor methodology, red flags, our published test results, COA checklist.
Safety. Side effects.
The watch-for list — contraindications, drug interactions, monitoring labs, when to stop.
Get the report · $19 ↓Editorial position.
Our editorial position — explicit yes / no / depends, with the reasoning behind it.
Get the report · $19 ↓Citations.
- 01Schumacher A, et al. Human Chorionic Gonadotropin-Mediated Immune Responses That Facilitate Embryo Implantation and Placentation. Frontiers in immunology. 2019;10:2896. PMID: 31921157.
- 02Esteves SC, et al. Human chorionic gonadotropin-based clinical treatments for infertile men with non-obstructive azoospermia. Andrology. 2026;14(4):1029-1063. PMID: 39901824.
- 03Heidegger H, et al. Human Chorionic Gonadotropin (hCG)-An Endocrine, Regulator of Gestation and Cancer. International journal of molecular sciences. 2018;19(5). PMID: 29772831.
- 04Schüler-Toprak S, et al. Human Chorionic Gonadotropin and Breast Cancer. International journal of molecular sciences. 2017;18(7). PMID: 28754015.
- 05Schumacher A. Human Chorionic Gonadotropin as a Pivotal Endocrine Immune Regulator Initiating and Preserving Fetal Tolerance. International journal of molecular sciences. 2017;18(10). PMID: 29039764.
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- 06Braunstein GD. False-positive serum human chorionic gonadotropin results: causes, characteristics, and recognition. American journal of obstetrics and gynecology. 2002;187(1):217-24. PMID: 12114913.
- 07Sinha A, et al. Persistently elevated β-human chorionic gonadotropin level after vacuum-assisted uterine aspiration: a case report. Journal of medical case reports. 2022;16(1):279. PMID: 35842706.
- 08Stenman UH, et al. Determination of human chorionic gonadotropin. Best practice & research. Clinical endocrinology & metabolism. 2013;27(6):783-93. PMID: 24275190.
- 09Triozzi PL, et al. Human chorionic gonadotropin as a target for cancer vaccines. Oncology reports. 1999;6(1):7-17. PMID: 9864394.
- 10Hershman JM. Role of human chorionic gonadotropin as a thyroid stimulator. The Journal of clinical endocrinology and metabolism. 1992;74(2):258-9. PMID: 1730804.
- 11Choi J, et al. Luteinizing hormone and human chorionic gonadotropin: origins of difference. Molecular and cellular endocrinology. 2014;383(1-2):203-13. PMID: 24365330.
- 12Acevedo HF. Human chorionic gonadotropin (hCG), the hormone of life and death: a review. Journal of experimental therapeutics & oncology. 2002;2(3):133-45. PMID: 12415629.
- 13Brady PC, et al. Hyperglycosylated human chorionic gonadotropin as a predictor of ongoing pregnancy. American journal of obstetrics and gynecology. 2020;222(1):68.e1-68.e12. PMID: 31401260.
- 14Fan J, et al. Advances in human chorionic gonadotropin detection technologies: a review. Bioanalysis. 2017;9(19):1509-1529. PMID: 29056064.
- 15Lunenfeld B, et al. Immunology of human chorionic gonadotropin (HCG). Vitamins and hormones. 1967;25:137-90. PMID: 4868320.
- 16Odell WD, et al. Human chorionic gonadotropin-like proteins: secretion in nonpregnant humans and production by bacteria. Transactions of the American Clinical and Climatological Association. 1992;103:238-54. PMID: 1413384.
- 17Gronowski AM. Why Is It So Hard to Report Quantitative Human Chorionic Gonadotropin Results?. The journal of applied laboratory medicine. 2020;5(5):847-849. PMID: 32794564.
- 18Herskovits AZ, et al. False-Negative Urine Human Chorionic Gonadotropin Testing in the Clinical Laboratory. Laboratory medicine. 2020;51(1):86-93. PMID: 31245816.
- 19Rao CV. Potential Therapy for Rheumatoid Arthritis and Sjögren Syndrome With Human Chorionic Gonadotropin. Reproductive sciences (Thousand Oaks, Calif.). 2016;23(5):566-71. PMID: 26239386.
- 20Maeyama T, et al. Beta-human chorionic gonadotropin-producing neuroblastoma: an unrecognized cause of gonadotropin-independent precocious puberty. Endocrine journal. 2022;69(3):313-318. PMID: 34645729.
- 21Simonart T, et al. Treatment of Kaposi's sarcoma with human chorionic gonadotropin. Dermatology (Basel, Switzerland). 2002;204(4):330-3. PMID: 12077540.
- 22Lee D, et al. Effects of intrauterine human chorionic gonadotropin administration on endometrial receptivity and embryo implantation. Life sciences. 2022;311(Pt A):121154. PMID: 36356892.
- 23Choobun T, et al. Trend of serum beta-human chorionic gonadotropin levels after medical abortion in the early first trimester of pregnancy. The journal of obstetrics and gynaecology research. 2023;49(1):103-108. PMID: 36184565.
- 24Vaitukaitis JL. Human chorionic gonadotropin--a hormone secreted for many reasons. The New England journal of medicine. 1979;301(6):324-6. PMID: 450020.
- 25Fukunaga FH. Human chorionic gonadotropin. Hawaii medical journal. 1989;48(4):143, 146. PMID: 2737900.
- 26Merz WE. Biosynthesis of human chorionic gonadotropin: a review. European journal of endocrinology. 1996;135(3):269-84. PMID: 8890715.
- 27Iles RK, et al. Human chorionic gonadotropin expression by bladder cancers: biology and clinical potential. The Journal of urology. 1991;145(3):453-8. PMID: 1705292.
- 28Tyrey L. Human chorionic gonadotropin assays and their uses. Obstetrics and gynecology clinics of North America. 1988;15(3):457-75. PMID: 2852329.
- 29Grenache DG. Progress in understanding the use of human chorionic gonadotropin as a tumor marker. Clinical chemistry and laboratory medicine. 2020;58(3):323-325. PMID: 31926077.
- 30Elsheikh HM, et al. Effective purification of human chorionic gonadotropin and production of highly specific polyclonal anti-βHCG as a component of radioimmunoassay kit. Journal of immunoassay & immunochemistry. 2022;43(3):233-249. PMID: 34672902.
- 31Stenman UH, et al. Immunoprocedures for detecting human chorionic gonadotropin: clinical aspects and doping control. Clinical chemistry. 1997;43(7):1293-8. PMID: 9216477.
- 32Oka S, et al. Effects of human chorionic gonadotropin on testicular interstitial tissues in men with non-obstructive azoospermia. Andrology. 2017;5(2):232-239. PMID: 27860441.
- 33Manabe T, et al. Human chorionic gonadotropin in normal, inflammatory, and carcinomatous gastric tissue. Gastroenterology. 1985;89(6):1319-25. PMID: 2414146.
- 34Stenman UH. Standardization of assays for human chorionic gonadotropin. Clinical chemistry. 2004;50(5):798-800. PMID: 15105346.
- 35Canfield RE, et al. Studies of human chorionic gonadotropin. Recent progress in hormone research. 1971;27:121-64. PMID: 4946129.
- 36Cole LA. "Background" human chorionic gonadotropin in healthy, nonpregnant women. Clinical chemistry. 2005;51(10):1765-6. PMID: 16189375.
- 37Minamiyama T, et al. Detection of human chorionic gonadotropin (HCG) in fabric urine stains older than five years. Journal of forensic sciences. 2023;68(4):1401-1404. PMID: 37149739.
- 38Kallfa E, et al. [Control of the level of human chorionic gonadotropin in urine compared to the level of serum after medically provoked abortion is a safe alternative]. Ugeskrift for laeger. 2021;183(38). PMID: 34596518.
- 39Ferraro S, et al. Human chorionic gonadotropin in oncology: a matter of tight (bio)marking. Clinical chemistry and laboratory medicine. 2020;58(3):e57-e60. PMID: 31714879.
- 40Asvold BO, et al. Human chorionic gonadotropin, angiogenic factors, and preeclampsia risk: a nested case-control study. Acta obstetricia et gynecologica Scandinavica. 2014;93(5):454-62. PMID: 24575980.
- 41Morita H, et al. [Human chorionic gonadotropin (hCG) and subunits]. Nihon rinsho. Japanese journal of clinical medicine. 2005;63 Suppl 8:464-8. PMID: 16149552.
- 42Nakanishi T. [Human chorionic gonadotropin in non-trophoblastic cancer]. Nihon rinsho. Japanese journal of clinical medicine. 2006;Suppl 3:299-302. PMID: 17022551.
- 43Maruo T, et al. [Human chorionic gonadotropin (hCG) and subunits]. Nihon rinsho. Japanese journal of clinical medicine. 1999;57 Suppl:295-8. PMID: 10778121.
- 44Kosasa TS. Measurement of human chorionic gonadotropin. The Journal of reproductive medicine. 1981;26(4):201-6. PMID: 6163852.
- 45Cochran JS, et al. The endocrinology of human chorionic gonadotropin-secreting testicular tumors: new methods in diagnosis. The Journal of urology. 1975;114(4):549-55. PMID: 1242015.
- 46Dabrowski F, et al. Non trophoblastic source of human chorionic gonadotropin - problem in diagnostic accuracy. Neuro endocrinology letters. 2015;36(4):316-9. PMID: 26454486.
- 47Wenneker E, et al. Two Cases of Beta-Human Chorionic Gonadotropin-Positive Oral Tongue Cancer Resulting in False-Positive Pregnancy Tests. Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery. 2023;168(4):898-899. PMID: 35471953.
- 48Ross GT. Clinical relevance of research on the structure of human chorionic gonadotropin. American journal of obstetrics and gynecology. 1977;129(7):795-808. PMID: 343593.
- 49Ibuki Y, et al. [Human chorionic gonadotropin (hCG) and subunits]. Nihon rinsho. Japanese journal of clinical medicine. 1995;53 Su Pt 2:593-9. PMID: 8753312.
- 50Hrehorcák M, et al. [Human chorionic gonadotropin, its degradation products and possibilities of their use]. Ceska gynekologie. 1999;64(2):108-13. PMID: 10510554.
- 51MIDGLEY AR Jr, et al. Immunohistochemical localization of human chorionic gonadotropin. The Journal of experimental medicine. 1962;115(2):289-94. PMID: 14473560.
- 52Patel P, et al. Cannabis use and serum beta-human chorionic gonadotropin: a smoky illusion. Clinical and experimental dermatology. 2023;48(9):1063-1064. PMID: 37279527.
- 53Lee PA. Appropriate use and interpretation of human chorionic gonadotropin stimulation in prepubertal male patients. Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists. 2000;6(1):112-4. PMID: 11419932.
- 54Peng L, et al. Adding human chorionic gonadotropin to frozen-thawed embryo transfer cycles pretreated with GnRH-a improves clinical pregnancy rates: a retrospective study. Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology. 2025;41(1):2513640. PMID: 40481812.
- 55Akasu F. [Human chorionic gonadotropin]. Horumon to rinsho. Clinical endocrinology. 1966;14(10):825-8. PMID: 6009391.
- 56Bidot S, et al. Persistent Elevation of Serum Human Chorionic Gonadotropin in a Nonpregnant Woman. The journal of applied laboratory medicine. 2021;6(5):1366-1370. PMID: 33458767.
- 57Pattillo RA, et al. Gestational trophoblastic disease and human chorionic gonadotropin measurement. The Journal of reproductive medicine. 1987;32(9):629-33. PMID: 2822916.
- 58Cole LA, et al. Selecting human chorionic gonadotropin immunoassays: consideration of cross-reacting molecules in first-trimester pregnancy serum and urine. American journal of obstetrics and gynecology. 1993;168(5):1580-6. PMID: 8498446.
- 59Braunstein GD. Evidence favoring human chorionic gonadotropin as the physiological 'rescuer' of the corpus luteum during early pregnancy. Early pregnancy : biology and medicine : the official journal of the Society for the Investigation of Early Pregnancy. 1996;2(3):183-90. PMID: 9363215.
- 60Berkowitz RS, et al. Cerebrospinal fluid human chorionic gonadotropin levels in normal pregnancy and choriocarcinoma. Surgery, gynecology & obstetrics. 1981;153(5):687-9. PMID: 7292268.
Everything you need to start.
Dose, sourcing, safety, our verdict. One purchase. Yours forever.
Built from 60 cited studies.