Male factor infertility contributes to approximately half of infertility cases worldwide. Epidemiological data suggest a gradual decline in sperm concentration over the past several decades, raising concerns regarding environmental, lifestyle, and metabolic influences.
International reference standards for semen parameters are periodically updated by the World Health Organization. These guidelines define lower reference limits for sperm concentration, motility, and morphology, serving as global benchmarks for fertility assessment.
Factors implicated in declining sperm quality include exposure to endocrine-disrupting chemicals, sedentary behavior, obesity, smoking, psychological stress, and delayed fatherhood. Occupational hazards and environmental pollutants also contribute.
Public health initiatives aimed at reproductive education, lifestyle modification, and early screening are essential in addressing global trends. Multidisciplinary collaboration between clinicians, researchers, and policymakers is required to mitigate erotic long-term reproductive risks.
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