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HCG for Men: Uses, Evidence, Side Effects and Fertility

Quick answer. HCG is a prescription hormone that acts like the body's own signal (LH) telling the testes to make testosterone and support sperm production. The FDA label covers selected cases of low testosterone caused by a pituitary problem. Doctors also prescribe it off-label, for example alongside testosterone therapy (TRT) to protect sperm production. The evidence for these uses comes mostly from small studies. HCG is not approved for weight loss, bodybuilding or boosting testosterone in healthy men.

By USAHCG · Updated November 15, 2026. Educational information; discuss individual treatment decisions with your prescriber or pharmacist.

What does HCG do in men?

HCG (human chorionic gonadotropin) binds to the same receptor as luteinizing hormone (LH). In men, LH tells the testes to produce testosterone and helps keep sperm production going. Testosterone therapy can switch off that signal, which is why doctors have looked at HCG as an add-on (Hsieh et al., 2013).

When do doctors use HCG in men?

Use	Approval status	What the evidence looks like
Low testosterone from a pituitary problem (hypogonadotropic hypogonadism), including fertility	FDA label covers selected cases	A 2026 study of 35 men with no sperm: 74% went on to produce sperm (78% among the 32 men who also took FSH), and about two-thirds of those who wanted children achieved a pregnancy. It was retrospective and from one hospital (Huijben et al.)
Alongside TRT, to protect testicular function and sperm	Off-label	Small studies, including a 3-week trial in healthy men and a 26-man chart review. See HCG dosage on TRT
Alone, for low-testosterone symptoms in men who do not want fertility treatment	Off-label	A small chart review of 20 men: testosterone rose from an average of 362 to 520 ng/dL and half reported better symptoms. No control group (Madhusoodanan et al., 2019)
Weight loss, bodybuilding or performance	Not approved	The FDA says there is no substantial evidence for weight loss; there is no approval for performance use

How long does HCG take to work in men?

It depends on what you are measuring. Hormone changes in the testes can appear within weeks: in a 3-week trial, low-dose HCG kept testicular testosterone far above placebo in men whose own signal was suppressed (Coviello et al., 2005). Sperm production takes much longer. In the 2026 study above, the median time to first sperm was 7 months and to pregnancy 21 months. Symptom changes in the chart review took a median of 8 months of treatment.

Side effects and who should not use HCG

The prescribing information lists, in men, breast enlargement and water and sodium retention. It also lists headache, irritability, restlessness, depression, fatigue and injection-site reactions such as bruising, pain, redness and swelling. Allergic reactions, rarely including anaphylaxis, have been reported.

It should not be used by people who have had an allergic reaction to it, who have uncontrolled thyroid, adrenal or pituitary disorders, or who have breast or prostate tumors. Tell your prescriber about your full history and all medicines. Report new symptoms rather than changing hormone treatment yourself. Source: PREGNYL prescribing information.

What dose do men take?

There is no single dose. The label lists regimens for men with hypogonadotropic hypogonadism ranging from 500 to 1,000 units three times a week up to 4,000 units three times a week. Studies of HCG with TRT used other doses again. Those numbers belong to specific diagnoses and trials, so do not copy a protocol from a forum or a study. Our guide HCG dosage on TRT explains what the studies tested and where they fall short.

Why would a man have an hCG blood test?

Healthy men normally have no measurable hCG. Doctors order the test as a tumor marker, because a raised level can point to certain tumors, such as testicular germ cell tumors (NCI SEER training). That is a different purpose from taking HCG as a medicine. A raised result needs medical follow-up.

Do men need a prescription, and what does it cost?

Yes. In the U.S. the FDA has approved HCG only as a prescription drug. USAHCG sells a 5,000 IU HCG vial; see the product page for the current price and what is included. For mixing and storage see the mixing and injection guide and Does HCG need to be refrigerated?.

What to ask your prescriber

What is this meant to change: testosterone, symptoms, or sperm production?
Which tests come first, and which will show whether it worked (testosterone, LH, FSH, a semen analysis if fertility matters)?
What dose, how often, and for how long?
Do I still need testosterone, and how will that change if we want a pregnancy?
Which side effects should make me call you?

Frequently asked questions

Does HCG raise testosterone?

In small studies it did in some men. Those studies were not controlled, so a prescriber should judge whether it suits you.

When does HCG kick in for men?

Hormone changes can show within weeks, while sperm production takes months.

Does HCG require a prescription?

Yes, in the U.S. it is a prescription drug.

Is HCG approved for men?

The FDA label covers selected cases of hypogonadotropic hypogonadism. Other uses, such as with TRT, are off-label.

Can HCG replace testosterone therapy?

Small studies suggest some men's testosterone rose on HCG alone, but this is for a prescriber to decide.

What is the hCG test for men?

A tumor-marker blood test. It is not the same as taking HCG.

How much does HCG cost?

See the USAHCG product page for the current price of a 5,000 IU vial.