HMG peptide (human menopausal gonadotropin) is a prescription fertility drug containing FSH and LH. Learn how it works, who uses it, and its risks.
HMG peptide is a prescription fertility medication — human menopausal gonadotropin, also called menotropins — that supplies both follicle-stimulating hormone (FSH) and luteinizing hormone (LH) activity in a 1:1 ratio. It is given by injection to stimulate the ovaries during IVF and ovulation induction, and in some men to support sperm production. In the United States, HMG is sold only by prescription and is not a fitness, weight-loss, or anti-aging product.
Most people searching for "hmg peptide" expect a research chemical they can buy online. What they find instead is a gonadotropin preparation that predates the modern peptide market by decades, most often dispensed under the brand name Menopur.
What Is HMG Peptide?
Human menopausal gonadotropin is a purified mixture of two hormones obtained from the urine of postmenopausal women. FSH and LH are glycoprotein hormones, meaning each is built from amino acid chains with sugar groups attached — which is why the word "peptide" gets tacked onto the name in casual search.
A standard US vial delivers 75 IU of FSH activity and 75 IU of LH activity. Early products such as Pergonal and Repronex have been replaced by more highly purified menotropins, and recombinant FSH has taken over many stimulation protocols.
- FSH recruits and grows ovarian follicles and drives sperm production in men.
- LH activity supports follicle maturation and hormone output.
- Source — urine-derived hMG or recombinant gonadotropins made in lab cells.
How HMG Peptide Works in the Body
HMG replaces the gonadotropins the pituitary normally releases to control the ovaries and testes. Because it is injected, it bypasses the brain's feedback loop and acts directly on the gonads.
In a natural cycle, one follicle usually matures. In a stimulated IVF cycle, HMG pushes the ovaries to recruit several follicles at once, which increases the number of eggs available for retrieval.
HMG does not trigger ovulation on its own. A separate injection of hCG or a GnRH agonist is given at the right moment to mature and release the eggs.
What HMG Peptide Is Used For
- IVF and egg freezing — controlled ovarian hyperstimulation before egg retrieval.
- Ovulation induction — for women who do not ovulate, including some with PCOS, when oral options fail.
- Hypogonadotropic hypogonadism in men — paired with hCG to restore sperm production and natural testosterone.
- Fertility preservation on testosterone therapy — some men on TRT add HMG under specialist supervision to maintain sperm output.
HMG does not build muscle and is not a performance-enhancing drug. Its only recognized role in men is hormonal and fertility-related, and that use requires a diagnosis and ongoing monitoring.
HMG vs Other Fertility Medications
| Medication | What it contains | Main role in treatment |
|---|---|---|
| HMG (menotropins) | FSH + LH activity, 1:1 | Follicle recruitment and maturation |
| Recombinant FSH | FSH only | Standard IVF stimulation |
| hCG | LH-like activity | Ovulation trigger; testosterone and sperm support in men |
| Clomiphene citrate | Oral, not a hormone | Signals the brain to raise natural FSH and LH |
HMG and hCG are both gonadotropins, but they are not interchangeable. hCG mimics LH and triggers the final step of egg maturation. HMG provides FSH and LH activity to grow follicles in the first place.
Dosage, Monitoring, and Side Effects
A reproductive endocrinologist sets the dose, commonly starting between 75 and 225 IU per day and adjusting it based on ultrasound scans and blood estradiol levels. There is no safe at-home dose, and self-adjusting is dangerous.
Common side effects
- Redness, bruising, or soreness at the injection site
- Headache, bloating, and mood changes
- Mild pelvic pressure from enlarged ovaries
Serious risks
- Ovarian hyperstimulation syndrome (OHSS) — rapid weight gain, severe abdominal pain, nausea, and shortness of breath.
- Multiple pregnancy — twins or higher-order multiples, with added maternal and infant risk.
- Blood clots and ovarian torsion — uncommon but requiring emergency care.
Anyone receiving HMG needs regular ultrasound monitoring. Seek care immediately for severe pain, vomiting, or trouble breathing.
Legal Status and Peptide Name Confusion
HMG is FDA-approved only as a prescription fertility drug. Vials sold online without a prescription are unregulated and may be underdosed, contaminated, or mislabeled, and these drugs also require cold-chain handling to stay stable.
The word "peptide" covers a huge range of unrelated products. A cosmetic peptide serum sold for fine lines has nothing in common with HMG. Neither does an aod9604 peptide sold as a research chemical, or a hydrolyzed collagen peptide supplement from the grocery aisle. If you are trying to understand what does glucagon-like peptide 1 do, that is a GLP-1 question about appetite and blood sugar, not fertility.
That overlap is also why sourcing transparency matters. Research vendors such as pure peptide labs publish third-party certificates of analysis, while licensed fertility pharmacies dispense HMG only against a valid prescription.
Frequently Asked Questions
What is HMG peptide used for?
HMG peptide is used to stimulate the ovaries during IVF and ovulation induction, and to treat hypogonadotropic hypogonadism in men. It is also sometimes added to testosterone therapy to help preserve sperm production. It is not used for muscle growth, weight loss, or skin care.
Is HMG peptide the same as hCG?
No. HMG contains both FSH and LH activity and is used mainly to grow multiple ovarian follicles. hCG acts like LH and is used to trigger ovulation or support testosterone and sperm production in men. The two are often used together in the same fertility cycle, but they are different drugs.
Can you buy HMG peptide online without a prescription?
No. In the United States, HMG is FDA-approved only as a prescription medication, most commonly sold as Menopur. Products marketed as "HMG peptide" on unregulated websites are not legally available for human use and may be underdosed, contaminated, or mislabeled. Talk to a fertility specialist or pharmacist about legitimate sourcing.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.