Male Infertility: Causes & Treatment | VitaGroup®

Scientific Analysis of Causes, Diagnosis and Treatment

Epidemiology and clinical significance

Male infertility is one of the most common clinical issues in reproductive medicine. According to WHO data, the male factor is exclusively or partially responsible for infertility in 40 to 50% of couples experiencing conception difficulties. Despite these statistics, male infertility remains underdiagnosed, as men seek medical help less frequently than women.

Pathophysiology of male infertility

Spermatogenesis is a complex biological process that depends on the integrity of the endocrine system, testicular health and the absence of harmful environmental factors. Any disruption at these levels can affect sperm count, motility or morphology, reducing the probability of natural fertilization.

A key pathophysiological mechanism extensively studied is oxidative stress. Overproduction of reactive oxygen species causes DNA damage to sperm cells, reduces cell membrane fluidity and negatively affects motility. Modern research estimates that oxidative stress contributes to infertility in 30 to 80% of clinical cases.

Causes of male infertility

Oligospermia   Reduced sperm concentration below 16 million per milliliter (WHO 2021 criteria). The most common abnormality found in semen analysis.

Asthenospermia   Reduced progressive sperm motility, hindering penetration of the cervix and access to the egg.

Teratospermia   Increased percentage of morphologically abnormal sperm, affecting fertilization capacity.

Hormonal disorders   Hypogonadism, hyperprolactinemia or hypothalamic-pituitary-testicular axis dysfunction directly affect spermatogenesis regulation.

Varicocele   The most commonly identified anatomical cause of male infertility, leading to increased intratesticular temperature and accumulation of toxic metabolites.

Lifestyle and environmental factors   Smoking, chronic alcohol consumption, obesity, exposure to endocrine disruptors and chronic psychological stress have been associated with significant reduction in sperm quality.

Diagnostic approach

Diagnostic investigation begins with semen analysis, which provides quantitative and qualitative information about sperm. It evaluates count, motility, morphology, ejaculate volume and other clinically significant parameters. Assessment of two samples at least three weeks apart is recommended for reliable results.

Further evaluation may include:

• Hormonal profile   FSH, LH, total and free testosterone, prolactin and thyroid hormones.
• Scrotal ultrasound   For detection of varicocele, testicular masses or structural abnormalities.
• Genetic testing   In cases of severe oligospermia or azoospermia, testing for Y chromosome mutations or Klinefelter syndrome.

Lifestyle modification

Strong evidence suggests that lifestyle modification can measurably improve sperm parameters. Adopting a Mediterranean diet rich in antioxidants has been associated with improved motility and morphology. Regular moderate aerobic exercise improves insulin sensitivity and testosterone levels. Smoking cessation is a high-priority factor given the direct genotoxic effect of tobacco on sperm DNA.

Role of micronutrients

Zinc   Essential for normal spermatogenesis and testosterone synthesis. Deficiency has been associated with oligospermia in multiple clinical studies.

Selenium   A structural component of glutathione peroxidase, a key antioxidant enzyme. Studies show improved sperm motility and morphology with supplementation.

Folic acid   Involved in DNA synthesis and repair. Combined with zinc, has shown positive effects on sperm count.

Vitamin C   Water-soluble antioxidant found in high concentrations in seminal fluid. Protects sperm DNA from oxidative damage.

Vitamin E   Fat-soluble antioxidant that protects cell membranes from lipid peroxidation, maintaining structural integrity of sperm.

Supplementation with the above nutrients does not replace medical treatment, but can act as supportive therapy within a comprehensive treatment approach.

Medical and surgical options

In cases of reversible causes such as varicocele, surgical correction has proven effective in improving sperm parameters. Hormonal disorders are treated pharmacologically under the guidance of an endocrinologist or andrologist. In cases of severe infertility, modern assisted reproduction methods such as intracytoplasmic sperm injection (ICSI) offer high success rates.

Conclusions

Male infertility is a multifactorial clinical entity with documented causes and effective treatment options. Early diagnostic evaluation, lifestyle modification, targeted nutritional support with proven micronutrients and appropriate medical treatment together form a comprehensive strategy that can significantly improve the chances of conception.

This article is for informational and scientific purposes only. It does not constitute medical advice and does not replace the opinion of a specialist. For any concerns regarding reproductive health, consult an andrologist or urologist.