MEN’S HORMONE & FERTILITY
It’s a question that comes up frequently among men being treated for low testosterone, particularly men who are concerned about fertility, testicular function, or maintaining natural testosterone production.
The short answer is: clomiphene and testosterone replacement therapy work in very different ways, and combining them is not a standard, one-size-fits-all treatment.
Clomiphene citrate, commonly known as Clomid, is a selective estrogen receptor modulator (SERM) that can stimulate the body’s own production of testosterone. TRT, on the other hand, supplies testosterone from outside the body.
At Valyr Health, treatment decisions should be based on the underlying cause of low testosterone, symptoms, laboratory results, fertility goals, and the patient’s individual response to therapy.
What Is Clomiphene (Clomid)?
Clomiphene citrate is a medication originally developed for the treatment of female infertility. In men, its use for testosterone deficiency is considered off-label.
Clomiphene works differently from testosterone replacement therapy.
Rather than supplying testosterone directly, clomiphene can influence the hypothalamus and pituitary gland, increasing signaling through hormones such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
Those hormones stimulate the testes to produce testosterone and support sperm production.
This is one reason clomiphene may be considered for certain men with low testosterone who want to preserve fertility.
A systematic review and meta-analysis of clomiphene treatment in men with hypogonadism found that clomiphene generally increased total and free testosterone as well as LH and FSH. The review also reported improvements in some measures of hypogonadal symptoms, although the studies varied substantially in design and quality.
Read the study on PubMed: Clomiphene citrate for men with hypogonadism: a systematic review and meta-analysis
How Does TRT Work?
Testosterone replacement therapy works differently.
Instead of asking the body to produce more testosterone, TRT provides exogenous testosterone through an approved treatment route such as injections, gels, or other formulations.
TRT can effectively increase circulating testosterone and may improve symptoms associated with confirmed testosterone deficiency.
However, supplying testosterone from outside the body also provides negative feedback to the hypothalamic-pituitary-gonadal axis.
As a result, LH and FSH production can decrease, which can reduce intratesticular testosterone and sperm production.
This is an important distinction for men who want to preserve fertility.
Research has consistently demonstrated that exogenous testosterone can suppress sperm production.
Read the PubMed review: Exogenous Testosterone-A Preventable Cause of Male Infertility
Clomid vs. TRT: What's the Difference?
The simplest way to understand the difference is:
Clomiphene
Testosterone Replacement Therapy
Stimulates the body’s own testosterone production
Provides testosterone from outside the body
Can increase LH and FSH
Generally suppresses LH and FSH
May help preserve testicular testosterone production
Can reduce intratesticular testosterone
May preserve sperm production in appropriate patients
Can significantly suppress sperm production
Used off-label in men
Established treatment for appropriately diagnosed testosterone deficiency
Oral medication
Available in multiple formulations
Neither approach is automatically better for every man.
The appropriate treatment depends on why testosterone is low and what the patient wants treatment to accomplish.
Can Clomid Be Used Instead of TRT?
For some men, yes.
Clomiphene has been studied as an alternative to exogenous testosterone in men with hypogonadism.
A prospective study of young hypogonadal men found that long-term clomiphene treatment increased testosterone levels and improved measures of hypogonadal symptoms. The study specifically considered clomiphene as an alternative for men who wanted to maintain fertility.
Read the study on PubMed: Outcomes of clomiphene citrate treatment in young hypogonadal men
Another study comparing testosterone therapy and clomiphene found that both treatments increased testosterone levels and improved symptoms, although the magnitude of the response differed between treatment groups.
Read the study on PubMed: Testosterone versus clomiphene citrate in managing symptoms of hypogonadism in men
More recently, a 2026 systematic review and meta-analysis comparing clomiphene with TRT found no statistically significant overall difference in testosterone levels between clomiphene and testosterone gel, although injectable testosterone produced higher testosterone levels in the limited study available for that comparison. The authors emphasized that the evidence has substantial heterogeneity and limitations.
Read the 2026 systematic review and meta-analysis on PubMed
How Effective Is Long-Term Clomid Treatment?
Clomiphene has been studied over relatively long periods in men with hypogonadism.
A 2019 multicenter study evaluated 400 men treated with clomiphene. Among men who continued treatment for more than three years, 88% achieved eugonadal testosterone levels and 77% reported improvement in symptoms. The study reported relatively few side effects, although estradiol levels increased significantly following treatment.
Read the study on PubMed: Long-Term Safety and Efficacy of Clomiphene Citrate for the Treatment of Hypogonadism
The study also reported side effects among some long-term users, including mood changes, blurred vision, and breast tenderness.
Another earlier study involving men treated with clomiphene for more than 12 months found significant increases in testosterone and improvements in bone density and hypogonadal symptom scores.
Read the study on PubMed: Clomiphene citrate is safe and effective for long-term management of hypogonadism
These studies are encouraging, but it is important to recognize that much of the evidence for clomiphene in men comes from retrospective studies, observational research, and relatively small clinical studies rather than large randomized trials.
What About Taking Clomid and TRT Together?
This is where the evidence becomes much more limited.
There is a scientific rationale for investigating combination therapy, but there is not enough evidence to consider combined clomiphene and TRT a standard treatment for testosterone deficiency.
A 2024 case series published in The Journal of Sexual Medicine examined three hypogonadal men who had taken clomiphene without adequate symptomatic improvement.
After three months of clomiphene therapy, the men had higher testosterone levels but continued to report symptoms of hypogonadism.
The researchers then added oral testosterone undecanoate to the clomiphene regimen.
After three additional months, testosterone levels increased substantially and the men reported improvements in symptoms including erectile dysfunction, fatigue, libido, and exercise tolerance.
Read the full study: Combined Clomiphene and High-Dose Oral Testosterone Therapy in Hypogonadal Men
But There Is an Important Limitation
This study included only three men.
That makes it a case series rather than a large clinical trial.
The researchers observed that LH and FSH decreased after testosterone was added but remained near baseline, and they suggested that this might have implications for fertility preservation. However, the study did not directly measure fertility outcomes such as sperm concentration, sperm motility, or pregnancy rates.
Therefore, it would be inappropriate to conclude from this study that adding clomiphene to TRT preserves fertility-or that clomiphene can increase fertility while a man is receiving exogenous testosterone.
Those questions require direct fertility measurements and larger studies.
Can Clomid Prevent TRT From Suppressing Fertility?
This is one of the most important questions-and one of the areas where patients should be cautious about claims made online.
TRT can suppress LH and FSH and reduce sperm production.
Clomiphene can increase LH and FSH in men whose hypothalamic-pituitary-gonadal axis is capable of responding to the medication.
Theoretically, that raises the possibility that combining the two medications could preserve some endogenous signaling.
However, maintaining LH and FSH at or near baseline is not the same thing as demonstrating preserved fertility.
Fertility is ultimately assessed through reproductive outcomes and, clinically, semen parameters such as sperm concentration, motility, and morphology.
The 2024 clomiphene-plus-testosterone case series did not directly evaluate those fertility endpoints.
Therefore, men who are actively trying to conceive should not assume that taking clomiphene with TRT will protect fertility.
If Fertility Matters, Should You Start TRT?
Men who want children now or in the future should discuss fertility before starting testosterone replacement therapy.
Exogenous testosterone can substantially suppress sperm production.
Depending on the underlying diagnosis, clinicians may consider approaches designed to stimulate endogenous testosterone production rather than immediately using exogenous testosterone.
Clomiphene is one potential off-label option in appropriately selected men.
A review of clomiphene for male hypogonadism concluded that the medication may be particularly useful in men interested in preserving fertility, although the evidence base remains limited.
Read the PubMed review: Clomiphene Citrate for the Treatment of Hypogonadism
Is Clomid Better Than TRT?
There is no universal answer.
For some men, clomiphene may be an attractive option because it stimulates endogenous testosterone production and may preserve sperm production.
For other men, TRT may provide more reliable symptom improvement or may be more appropriate based on the underlying cause of testosterone deficiency.
A 2026 retrospective analysis of more than 2,500 matched patients in each treatment group compared clomiphene with TRT and found different rates of several complications. However, because the study was retrospective and observational, its findings should not be interpreted as proof that clomiphene is universally safer than TRT.
This is an important example of why individual studies need to be interpreted within the context of their design.
What Are the Potential Side Effects of Clomiphene?
Clomiphene is not completely free of side effects.
Reported adverse effects in studies of men have included:
- Mood changes
- Headaches
- Dizziness
- Breast tenderness
- Gynecomastia
- Visual changes
- Changes in estradiol levels
The long-term study of 400 men found that only a small percentage reported side effects, but the possibility of adverse effects remains.
Any new visual symptoms while taking clomiphene should be discussed promptly with a healthcare professional.
What Are the Potential Risks of TRT?
Testosterone replacement therapy also has potential risks and requires monitoring.
Depending on the individual, monitoring may include:
- Testosterone levels
- Hemoglobin and hematocrit
- Blood pressure
- PSA when clinically appropriate
- Lipid and metabolic markers
- Fertility goals
- Symptoms and treatment response
- Sleep apnea symptoms
- Prostate and urinary symptoms
TRT can also suppress sperm production, making fertility planning an important part of the treatment discussion.
Who Might Be a Candidate for Clomiphene?
Clomiphene may be considered for certain men who:
- Have symptoms consistent with testosterone deficiency
- Have appropriately documented low testosterone
- Have an intact hypothalamic-pituitary-gonadal axis capable of responding to stimulation
- Want to preserve fertility
- Prefer an oral treatment approach
- Are appropriate candidates for off-label therapy
It is not appropriate for every cause of low testosterone.
For example, if the testes cannot adequately produce testosterone despite appropriate stimulation, simply increasing LH and FSH may not correct the underlying problem.
That is why identifying the cause of low testosterone is an important part of treatment.
Who Might Benefit From TRT?
TRT may be appropriate for men with confirmed testosterone deficiency who have symptoms and laboratory findings consistent with hypogonadism and who have been appropriately evaluated for potential causes and contraindications.
The treatment decision should also take into account fertility goals.
For a man who is actively trying to conceive, starting TRT without discussing its potential effects on sperm production can be a significant mistake.
Clomid + TRT: What Does the Research Actually Tell Us?
Based on the available evidence, several conclusions are reasonable:
1. Clomiphene can increase testosterone in some men
Multiple studies have demonstrated increases in testosterone and improvements in some hypogonadal symptoms with clomiphene.
2. Clomiphene may be useful when fertility preservation is important
Unlike exogenous testosterone, clomiphene can stimulate endogenous gonadotropin production and may preserve the hormonal environment required for sperm production.
3. TRT is effective but can suppress sperm production
This is a major consideration for men who want to maintain fertility.
4. Combining clomiphene and TRT is an emerging strategy-not an established standard
The published 2024 combination study involved only three men. While the results were interesting, the study cannot establish efficacy or fertility preservation for the broader population.
5. More research is needed
Larger prospective randomized studies that directly measure symptoms, testosterone levels, sperm parameters, and fertility outcomes are needed before combination therapy can be considered an evidence-based standard approach.
The Bottom Line
Clomiphene (Clomid) and testosterone replacement therapy are fundamentally different approaches to treating low testosterone.
Clomiphene attempts to stimulate the body’s own testosterone production, while TRT provides testosterone from outside the body.
For appropriately selected men, clomiphene can increase testosterone and may be particularly useful when fertility preservation is an important goal.
TRT can be highly effective for men with confirmed testosterone deficiency, but it can suppress sperm production.
Using clomiphene together with TRT is an area of ongoing investigation. A small 2024 case series found that three men experienced improved symptoms and maintained LH and FSH near baseline after combination therapy, but the study did not directly measure fertility. Therefore, the findings should be considered preliminary rather than proof that clomiphene protects fertility during TRT.
At Valyr Health, the right treatment starts with understanding the individual-not simply choosing a medication based on a testosterone number.
If you’re experiencing symptoms of low testosterone or are currently considering TRT and are concerned about fertility, discuss your goals with a qualified healthcare professional before beginning treatment.
Frequently Asked Questions
Combination therapy has been studied, but evidence is currently limited. A 2024 case series involved only three men, so larger studies are needed before conclusions can be drawn about the effectiveness or fertility benefits of combining the medications.
Yes. Studies have shown that clomiphene can increase endogenous testosterone in appropriately selected men.
Clomiphene may preserve endogenous testosterone and sperm production in appropriate patients, while exogenous testosterone can suppress sperm production. However, treatment decisions should be individualized.
There is currently insufficient evidence to make that claim. The small combination study involving clomiphene and oral testosterone measured hormone markers but did not directly measure fertility outcomes.
For some men, particularly those interested in fertility preservation, clomiphene may be considered as an off-label alternative to exogenous testosterone.
Clomiphene is used off-label in men for hypogonadism. Its FDA-approved indication is not male testosterone deficiency.
Do not change or stop prescription hormone therapy without discussing it with your healthcare professional. The appropriate approach depends on your diagnosis, laboratory results, symptoms, fertility goals, and treatment history.
Scientific Sources and Further Reading
Scientific Sources
Combination Clomiphene + Testosterone
Yoon G, Vo J, Sun AY. Combined Clomiphene and High-Dose Oral Testosterone Therapy in Hypogonadal Men: A Case Series. The Journal of Sexual Medicine. 2024;21(Supplement\_7).201.
Read the full article at Oxford Academic
Long-Term Clomiphene
Krzastek SC, et al. Long-Term Safety and Efficacy of Clomiphene Citrate for the Treatment of Hypogonadism. The Journal of Urology. 2019;202(5):1029-1035.
Read the study on PubMed
Additional Research
Moskovic DJ, et al. Clomiphene citrate is safe and effective for long-term management of hypogonadism. BJU International. 2012;110(10):1524-1528.
Read the study on PubMed
Wheeler KM, et al. Clomiphene Citrate for the Treatment of Hypogonadism. Sexual Medicine Reviews. 2019;7:272-276.
Read the review on PubMed
Huijben M, et al. Clomiphene citrate for men with hypogonadism: a systematic review and meta-analysis. Andrology.
Read the systematic review on PubMed
Katz DJ, et al. Outcomes of clomiphene citrate treatment in young hypogonadal men. BJU International.
Read the study on PubMed
Ramasamy R, et al. Exogenous testosterone: a preventable cause of male infertility.
Read the review on PubMed
Constantinou BN, et al. Clomiphene citrate versus testosterone replacement therapy in male hypogonadism: a systematic review and meta-analysis. 2026.
Read the 2026 meta-analysis on PubMed
This article is intended for educational purposes and does not constitute individualized medical advice. Clomiphene use in men is off-label. Testosterone replacement therapy and clomiphene should only be used under the supervision of a qualified healthcare professional. Treatment decisions should consider symptoms, laboratory findings, underlying diagnosis, potential risks, and fertility goals.
Talk With Valyr Health
A qualified Valyr Health clinician can review your symptoms, laboratory results, medical history, and treatment goals to discuss appropriate next steps.
