Boost your own testosterone, or replace it?
Enclomiphene vs TRT
Updated September 28, 2026
The short answer
TRT replaces testosterone from outside the body and reliably raises levels, but it switches off your own production and usually lowers sperm count. Enclomiphene signals your body to make more of its own testosterone and generally keeps sperm production intact, which is why it is often considered for younger men who want children. It only works if your testes can still respond, and it is not FDA-approved.
Enclomiphene vs TRT (testosterone) at a glance
| Enclomiphene | TRT (testosterone) | |
|---|---|---|
| How it works | Raises LH and FSH so your testes make more testosterone | Supplies testosterone directly |
| Effect on fertility | Sperm production generally preserved | Sperm production usually drops, sometimes to zero |
| Testicle size | Unchanged | Often shrinks |
| How you take it | Daily capsule | Injections every 1 to 2 weeks, or daily gel |
| Who it works for | Men whose testes still work (secondary hypogonadism) | Most men with low testosterone |
| FDA status | Not FDA-approved | FDA-approved for hypogonadism |
| Monitoring | Testosterone, estradiol, hematocrit | Testosterone, hematocrit, PSA |
Two ways to raise testosterone
Your brain controls testosterone production. The pituitary gland releases LH, which tells the testes to make testosterone, and FSH, which drives sperm production. When testosterone is high, the brain turns the signal down.
TRT adds testosterone from outside. The brain sees high levels and stops sending LH and FSH, so the testes slow down, which is why sperm counts fall. Enclomiphene blocks estrogen's feedback at the brain, so the brain sends more LH and FSH and the testes make more of their own testosterone.
Fertility is usually the deciding factor
For men who want children now or in the future, the effect of TRT on sperm is a serious drawback. It can take months to recover after stopping and occasionally does not fully recover. Enclomiphene's main appeal is that it raises testosterone while generally keeping sperm production going.
For men who are not concerned about fertility and want dependable levels, TRT is well established and FDA-approved.
Limits of enclomiphene
Enclomiphene only helps when the problem is a weak signal from the brain, known as secondary hypogonadism. If the testes themselves are not working, known as primary hypogonadism, there is nothing for the extra signal to act on, and TRT is the option.
It is not FDA-approved and is prescribed off-label. Some men notice headaches, mood changes or vision changes, which should be reported to a clinician straight away.
Testing comes first
Low testosterone should be confirmed with at least two early-morning blood tests before any treatment. LH and FSH tell a clinician whether the problem starts in the brain or the testes, which decides which option can work.
Common questions
This comparison is for general information and is not medical advice. Talk to a licensed clinician before starting, stopping or switching any medication.
Not sure which is right for you?
A licensed clinician reviews your history and labs and recommends the option that fits, if any.