HMG

By the Research Team at Generic Peptides

In 1949, an Italian researcher named Piero Donini figured out how to extract gonadotropins from urine. The source he chose was unusual: postmenopausal women. After menopause, FSH and LH levels skyrocket because the ovaries no longer respond to feedback signals. That hormonal flood, present in their urine, became the raw material for HMG — the medication that made modern fertility treatment possible.

What Is HMG?

HMG (Human Menopausal Gonadotropin), also called menotropins, is a mixture of two glycoprotein hormones: follicle-stimulating hormone (FSH) and luteinizing hormone (LH), typically in roughly a 1:1 ratio. It's purified from the urine of postmenopausal women, which contains both hormones in elevated quantities due to the natural hormonal changes of menopause. The product is freeze-dried and reconstituted before injection.

The mechanism is direct hormone replacement at the level of pituitary gonadotropins. FSH stimulates ovarian follicle development in women and supports spermatogenesis in men. LH triggers ovulation in women and stimulates Leydig cell testosterone production in men. By providing both hormones simultaneously, HMG mimics the natural pituitary-driven reproductive cascade — useful when the patient's own pituitary signaling is impaired.

The History That Defined Modern Fertility Medicine

Bruno Lunenfeld successfully introduced HMG into clinical practice in 1961. Before that, fertility treatment options for hypogonadotropic patients were extremely limited. HMG made controlled ovarian stimulation possible, which made IVF possible. The compound is in the lineage of every modern assisted reproductive technology.

Recombinant alternatives have since been developed — recombinant FSH (Gonal-F, Follistim) and recombinant LH — which allow precise control over the FSH:LH ratio without the variability of urinary extraction. But HMG remains in clinical use because the combination preparation is convenient and, in many protocols, clinically equivalent. Menopur (Ferring Pharmaceuticals) is currently the sole FDA-approved HMG product in the United States after Repronex and Bravelle were discontinued.

What Serious Buyers Should Know

The honest part: HMG is not a single defined molecule. It's a urinary extract containing FSH, LH, traces of HCG (which mimics LH activity and is sometimes added to standardize the product), and other proteins that vary by purification method. Highly purified HMG (HP-hMG) reduces the contaminating proteins; less purified versions retain more biological complexity. That's a meaningful difference for research applications — what's in the vial varies by purification grade in ways that affect FSH:LH bioactivity ratios and potential immunogenicity.

Regulatory note: HMG is an FDA-approved prescription drug, not a research peptide on the 503A bulks list. Menopur is approved for controlled ovarian stimulation in IVF and ovulation induction in anovulatory women. The compound has experienced intermittent supply shortages since late 2023, partly because biological manufacturing from urinary extraction is harder to scale than recombinant production, and partly because Menopur is currently the sole FDA-approved hMG product in the US market with no generic competition. WADA prohibits HMG for athletes in tested sports — gonadotropins are listed under category S2.3.

Why Generic Peptides for HMG?

Here's a sourcing problem that's specific to HMG: it's a complex biological mixture, not a synthesized peptide, and its bioactivity depends entirely on the FSH and LH glycoproteins remaining intact through extraction, purification, and storage. Cheap HMG sourced from unverified channels routinely arrives with degraded FSH activity, inconsistent LH content, or significant non-active protein contamination. The "1:1 FSH:LH ratio" claim on a label means nothing if the analytical verification isn't done — and most cheap suppliers don't run the bioactivity assays needed to confirm it. Glycoprotein integrity isn't visible by inspection.

Generic Peptides supplies research-grade HMG for sale at 99% purity, manufactured in the USA. Domestic processing with bioactivity verification — the part that matters when the molecule is a complex protein mixture rather than a simple synthesized chain.

Order HMG for sale in the USA — 99% purity, FSH/LH bioactivity verified, manufactured domestically.

HMG FAQ

Is it legal to buy HMG in the US?

HMG is an FDA-approved prescription drug (brand name Menopur) for fertility indications. As an FDA-approved biologic, it requires a prescription for human use. Sales as a research compound for laboratory use exist in a separate channel, focused on reproductive endocrinology research applications.

Is HMG a peptide?

Technically, no — HMG is a mixture of two glycoprotein hormones (FSH and LH), each consisting of an alpha and beta subunit. The molecules are full proteins with carbohydrate modifications, much larger and more complex than typical research peptides. The terminology "peptide" gets used loosely sometimes, but HMG is structurally and regulatorily a biologic.

What's the difference between HMG and HCG?

Different molecules, different mechanisms. HCG mimics LH activity exclusively — it binds the LH/CG receptor. HMG contains both FSH and LH activity, so it stimulates follicle development (FSH) and ovulation/testosterone production (LH). They're often used together in fertility protocols: HMG to develop follicles, HCG to trigger their release.

Why is Menopur the only HMG product available in the US?

Repronex and Bravelle, two earlier HMG products, were discontinued, leaving Menopur (Ferring Pharmaceuticals) as the sole FDA-approved menotropins product in the United States. There's no approved generic or biosimilar — biological manufacturing of urinary-derived gonadotropins is significantly more complex than chemical drug production, and the regulatory pathway for biosimilars adds further barriers.

I've seen HMG sold online for much cheaper — same product?

Probably not at the same purity or bioactivity. Cheap online HMG often comes from unverified manufacturers where FSH:LH ratios aren't reliably maintained and protein integrity isn't documented. With a glycoprotein mixture, label claims mean nothing without bioactivity verification — and most budget suppliers don't run the assays.

Two glycoproteins. One ratio that has to be right. Bioactivity verification isn't optional.