Why this peptide is on people's radar
HMG is one of the most-used fertility drugs in the world. The reason it exists at all is a clever bit of pharmaceutical history: postmenopausal women's pituitaries produce very high levels of FSH and LH (because the ovaries no longer respond and shut off the negative feedback). That hormone surplus ends up in urine, and starting in the 1950s, scientists figured out how to extract and purify it for clinical use. The result is a drug that contains both FSH and LH activity in one preparation, exactly the hormones needed to drive ovarian follicular development and ovulation in fertility treatment.
The clinical use cases are well-defined and established: in women with anovulatory infertility, HMG drives follicular development and ovulation. In IVF cycles, HMG is used as part of controlled ovarian stimulation protocols to develop multiple follicles for egg retrieval. In men with hypogonadotropic hypogonadism (low testosterone from upstream brain-axis problems) who want to maintain or restore fertility, HMG can be used alongside hCG to drive spermatogenesis.
HMG isn't really part of the broader peptide-research conversation outside fertility medicine. Bodybuilding-and-longevity protocols don't typically use it. We include it on this site because people search for it as part of comparing the gonadotropin options (alongside hCG and recombinant FSH/LH products).
What people are usually trying to do with it
Almost exclusively fertility-medicine use cases:
- Ovulation induction in women with anovulatory infertility
- Controlled ovarian stimulation in IVF cycles
- Stimulating spermatogenesis in men with hypogonadotropic hypogonadism
- Combined LH+FSH activity in fertility protocols where both hormones are needed
What the science actually shows
Plain-English summary:
Fertility treatment efficacy
Multiple decades of clinical use and randomized trials support HMG's efficacy in ovulation induction and controlled ovarian stimulation. Standard component of IVF protocols.
Combined LH+FSH advantage
Some trials suggest HMG (with both LH and FSH activity) produces somewhat better outcomes than pure recombinant FSH in older women or women with low LH levels, though the choice between products is generally a clinical judgment call.
Male spermatogenesis
HMG combined with hCG is used to restore spermatogenesis in men with hypogonadotropic hypogonadism who want fertility. The protocol is well-established.
The honest read
What's solid:
HMG is a well-established FDA-approved fertility drug with decades of clinical experience. The indications are clearly defined, the protocols are mature, and the evidence base is solid.
What's still being worked out:
The optimal choice between urinary HMG and recombinant FSH/LH products in different patient populations, generally a clinical-judgment call rather than a clear-cut answer.
What's hyped beyond the evidence:
HMG isn't really a target of bodybuilding or longevity hype; it's mainstream fertility medicine. People sometimes confuse it with hCG (which has both legitimate fertility uses and a discredited weight-loss diet history), the two are different drugs with different indications.
Things to know if you're looking into it
- Prescription only: HMG is FDA-approved as a prescription fertility medication. Brand names include Menopur and Pergonal.
- How it's used: subcutaneous or intramuscular injection, typically daily during the stimulation phase of a fertility cycle. Dosing is set by the reproductive endocrinologist based on response.
- Different from hCG: hCG mimics LH alone for triggering ovulation. HMG provides ongoing LH and FSH for follicular development. Different fertility roles.
- OHSS risk: ovarian hyperstimulation syndrome is a real risk with HMG and other gonadotropin therapy. Monitored closely in fertility clinics.
- Healthcare provider involvement: essential. HMG is fertility medicine and is administered exclusively under reproductive-endocrinology supervision.
- Specific dosing protocols, mechanism, and the full reference list: all in the "Want to go deeper?" section below.
What people often ask
How does HMG differ from hCG?
HMG contains both FSH and LH activity, used for ongoing follicular development. hCG mimics LH alone, used as a single-shot trigger for ovulation in fertility cycles. Different drugs, different roles.
Is HMG FDA-approved?
Yes, for ovulation induction in anovulatory infertility, controlled ovarian stimulation in IVF, and male hypogonadotropic-hypogonadism-related fertility issues. Brand names include Menopur and Pergonal.
Is it derived from urine?
Yes. HMG is purified from the urine of postmenopausal women, whose high baseline FSH/LH makes it a viable extraction source. Recombinant DNA-derived versions of FSH and LH also exist as alternatives.
Are there side effects?
The most concerning is ovarian hyperstimulation syndrome (OHSS), which fertility clinics monitor for closely. Other effects include injection-site reactions, abdominal discomfort, and (rarely) multiple pregnancies.
FDA and regulatory status
Status as of May 5, 2026: FDA-approved as Menopur, Pergonal, and other brand names for ovulation induction in anovulatory women, controlled ovarian stimulation in IVF cycles, and stimulation of spermatogenesis in men with hypogonadotropic hypogonadism. Status updates land here when they happen.
Want to go deeper?
Mechanism, dosing, and references.
Background
HMG is a glycoprotein hormone preparation purified from the urine of postmenopausal women. Standardized for FSH activity (typically 75 IU per vial) with proportional LH activity. FDA-approved since the 1970s.
Mechanism of action
FSH stimulates ovarian follicular development; LH supports steroidogenesis and triggers the periovulatory hormone surge. HMG provides both activities in one preparation. In men, HMG alongside hCG drives spermatogenesis through Sertoli cell stimulation.
Dosing
Set by the prescribing reproductive endocrinologist based on patient response, monitored by serial ultrasound and estradiol measurements during ovarian stimulation cycles.
References
- Practice Committee of the American Society for Reproductive Medicine. (2008). "Use of clomiphene citrate in women." Fertil Steril, 90(suppl). PubMed
- Al-Inany HG, Aboulghar MA, Mansour RT, Proctor M. (2003). "Recombinant versus urinary gonadotropins for triggering ovulation in assisted conception." Hum Reprod, 18(2), 305–313. PubMed
- Liu PY, Baker HW, Jayadev V, et al. (2009). "Induction of spermatogenesis and fertility during gonadotropin treatment of gonadotropin-deficient infertile men." J Clin Endocrinol Metab, 94(3), 801–808. PubMed