What men should know first
Enclomiphene and testosterone therapy can both raise a low testosterone number, but they get there in opposite ways. Enclomiphene turns up your own production, so sperm production continues. TRT supplies testosterone from outside, so your own production, and usually your sperm count, falls. That is the appeal of enclomiphene for younger men who want children.
The catch is regulatory. Enclomiphene is not an FDA-approved drug, it reaches patients only through compounding, and its compounding status has been under FDA review for years. Before weighing it, it helps to know what the evidence shows, where the rules stand in 2026, and what alternatives protect fertility on firmer footing.
Enclomiphene and TRT side by side
| Enclomiphene | TRT | |
|---|---|---|
| How it works | Blocks estrogen feedback at the brain, raising LH and FSH | Replaces testosterone directly |
| Effect on sperm | Maintained in trials | Usually reduced, sometimes to zero |
| FDA status | Not approved | FDA-approved products |
| How it is obtained | Compounded only | Pharmacy products, including compounded options |
| Needs working testes? | Yes | No |
| Long-term data in men | Limited | Large trials, including TRAVERSE |
| Form | Daily pill | Injections, capsules or pellets |
How enclomiphene works and what the trials show
Clomiphene citrate is a mixture of two isomers, and enclomiphene is the isomer that acts mainly as an estrogen blocker at the hypothalamus and pituitary. With that feedback muted, the brain releases more LH and FSH, the testes make more testosterone, and sperm production carries on. Because it works through the brain-to-testes signal, enclomiphene only makes sense when the testes can still respond, the same requirement HCG has. Men whose testes are the source of the problem gain little from either.
The main published evidence comes from two phase III studies reported in 2016. In men aged 18 to 60 with secondary hypogonadism, overweight and morning testosterone at or below 300 ng/dL, enclomiphene raised total testosterone, LH and FSH and kept sperm concentration in the normal range over 16 weeks. Men on testosterone gel reached similar testosterone levels but showed a marked drop in sperm production. Those were short trials in a selected group, not proof of long-term safety.
TRT’s effect on fertility is well established. The American Society for Reproductive Medicine notes that testosterone treatment usually leads to low sperm counts or no sperm in the semen. Our article on whether TRT affects fertility covers recovery after stopping.
Where enclomiphene stands with the FDA in 2026
No enclomiphene product has FDA approval. Because it is neither a component of an approved drug nor covered by a USP monograph, its long-term route to lawful compounding is the FDA’s 503A bulks list. At a June 8, 2022 advisory committee meeting, FDA proposed that enclomiphene citrate not be included, and the committee voted 8 to 4 against adding it, with several members citing a lack of clinical efficacy evidence.
The FDA has not issued a final decision since. Its 503A bulk drug substances list, last updated May 14, 2026, keeps enclomiphene citrate in Category 1, substances still under evaluation, where the FDA generally does not act against compounders while the review continues. That is a temporary policy, not an approval, and it can change. Our explainer on 503A and 503B compounding pharmacies explains how the categories work.
How labs separate the two paths
The AUA guideline asks for two early-morning testosterone tests and an LH level, says testosterone should not be used by men currently trying to conceive, and lists HCG, selective estrogen receptor modulators and aromatase inhibitors as options clinicians may use to keep fertility. LH is the pivot.
| Lab pattern | What it means | Fitting direction |
|---|---|---|
| Low testosterone, high LH | Testes are not responding | TRT if fertility is not a goal; fertility specialist if it is |
| Low testosterone, low or normal LH, wants children | Signal is weak, testes can respond | Fertility-sparing plan such as HCG; SERMs are discussed with a specialist |
| Low testosterone, low or normal LH, no fertility plans | Signal is weak | TRT or HCG, after checking prolactin and reversible causes |
| Normal testosterone on repeat | No deficiency | Neither; look for other causes |
A low LH should also prompt a search for the cause, from excess weight to high prolactin. Our page on low testosterone with low LH walks through that workup.
Side effects and monitoring
TRT’s watch points are well mapped: hematocrit, blood pressure, PSA, estradiol and sperm suppression. Enclomiphene has far less long-term data in men, and the committee members who voted no pointed to thin evidence that it works. Anyone on a medicine that raises LH needs follow-up testosterone and estradiol levels, and men using it for fertility need semen analyses to confirm it is working. Our enclomiphene medication page covers what is known about its side effects, and the clomiphene for men page covers the older mixed-isomer drug.
What Ultimate Male offers instead of enclomiphene
Enclomiphene is not on Ultimate Male’s treatment menu. If you ask about it, the provider will explain where it stands and whether your labs even fit the profile it was studied in. For men with secondary hypogonadism who want to protect fertility, the option the clinic offers is HCG therapy for men, an FDA-approved medication (Pregnyl) that keeps the testes active. Our comparison of HCG and TRT explains that choice in depth.
For men whose labs confirm low testosterone and who have no fertility plans, the conversation turns to testosterone therapy. If children are in the picture, mention it on the free phone call and read our page for men trying to conceive before your first visit.
