Hormonal Evaluation
Hormonal evaluation in men is a key part of investigating male fertility when there are indications of impaired spermatogenesis. Sperm production is regulated by the hypothalamic–pituitary–testicular axis and depends on the proper balance of specific hormones.
Testing is not performed in all men with a mild abnormality on semen analysis. It is mainly indicated when the findings are severe or when there are clinical signs suggesting an endocrine disorder.
Assessment of hormonal parameters helps clarify the cause of an abnormal semen analysis and determine the most appropriate therapeutic or reproductive strategy.
The additional contribution of a specialized andrologist/urologist is often considered necessary in cases of abnormal findings.
Which hormones are checked
Hormonal evaluation in men includes the main hormones that regulate spermatogenesis and testicular function.
The main hormones assessed are:
- FSH (Follicle-stimulating hormone): Reflects spermatogenic function. Elevated levels may indicate primary testicular damage.
- LH (Luteinizing hormone): Regulates testosterone production by the Leydig cells.
- Total Testosterone: The main male hormone, essential for spermatogenesis and sexual function.
In selected cases, additional hormones such as prolactin, TSH, or estradiol may also be checked when the medical history or clinical picture suggests it.
What the hormonal evaluation shows
Hormonal evaluation allows assessment of the function of the hypothalamic–pituitary–testicular axis and helps identify the cause of a disorder in testicular function.
Depending on the hormonal profile, the following may be identified:
- Primary testicular dysfunction, when the testes do not respond adequately to pituitary stimulation
- Hypogonadotropic hypogonadism, when there is a disorder in regulation by the hypothalamus or pituitary gland
- Disorders in testosterone production that affect spermatogenesis and sexual function
Hormonal evaluation can determine whether medical treatment may be possible or whether the reproductive strategy should be adjusted accordingly.
When it is indicated
Hormonal evaluation is indicated when there are findings or symptoms suggesting a possible disorder in the hormonal regulation of spermatogenesis.
It is mainly recommended in cases of:
- Severe oligospermia or azoospermia
- Significantly abnormal semen analysis
- Reduced libido or erectile dysfunction
- Clinical signs of hypogonadism (e.g. reduced body hair, decreased muscle mass)
- A history of surgery or trauma involving the testes
The decision to perform the evaluation is based on the overall clinical picture and the findings of the fertility work-up.
How hormonal evaluation is performed
Hormonal evaluation is carried out with a simple blood test.
No special preparation is required unless there is a specific medical instruction. In some cases, repeat testing may be requested to confirm an abnormal result.
Hormones and Reproductive Planning
The findings of hormonal evaluation significantly influence the formulation of the reproductive strategy and are not assessed in isolation. Their interpretation is made in combination with semen analysis, clinical history, and, where needed, further imaging or genetic testing.
In some cases, the hormonal disorder may be reversible and amenable to medical treatment aimed at improving spermatogenesis. When hypogonadotropic hypogonadism is identified, endocrinological intervention may be possible. By contrast, in cases of primary testicular failure, the reproductive approach is adjusted according to the available findings.
Early recognition of a hormonal disorder allows targeted intervention, when feasible, and contributes to realistic planning of the next steps—whether this involves conservative management or an organized approach to assisted reproduction.
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