Male Infertility and Reduced Life Expectancy: Epidemiology, Mechanisms, and Clinical Implications

Male infertility is a prevalent condition affecting approximately 15% of couples worldwide. Recent evidence indicates that, beyond its immediate reproductive implications, male infertility may reflect broader health concerns. Large-scale cohort studies consistently show that men with poorer semen parameters have elevated all-cause mortality compared to fertile counterparts, with a dose-dependent pattern whereby more severe abnormalities correlate with a higher risk of early death. Proposed mechanisms linking infertility to reduced life expectancy encompass genetic, hormonal, and lifestyle factors. For instance, Klinefelter syndrome exemplifies a genetic cause of azoospermia that also predisposes to metabolic syndrome, diabetes, and certain malignancies. Low testosterone, a frequent finding in testicular dysfunction, is implicated in obesity, insulin resistance, and cardiovascular disease, all of which can shorten lifespan. Additionally, psychosocial stress and depression-commonly reported among infertile men-may contribute to health-compromising behaviors. Environmental exposures and socioeconomic factors further compound these risks. Collectively, these data underscore the importance of recognizing male infertility as an early indicator of potentially modifiable health vulnerabilities. A comprehensive evaluation of infertile men should therefore extend beyond fertility assessments to include screening for chronic diseases, hormonal imbalances, and mental health issues. Targeted surveillance for specific cancers (e.g., testicular and prostate) and early interventions-such as lifestyle modifications, appropriate hormonal therapies, and psychosocial support-can improve both reproductive outcomes and long-term well-being. Given these insights, male fertility assessment may serve as a valuable gateway to broader men's healthcare, prompting proactive strategies that mitigate associated risks and potentially enhance longevity.