Uncertain Rise in Male Infertility Triggers Debate Over Causes and Myths

Researchers say male fertility appears to be declining, with obesity, smoking, diet, environmental exposures and later fatherhood cited as possible factors; however studies are mixed—some analyses show sharp declines in sperm counts since the 1970s, while others (including a 2025 Cleveland Clinic review) find counts steady—yet many clinicians note that male factors contribute to about one-third to half of infertility cases. The public conversation includes debunking myths (such as cellphone use and infertility) and emphasizes medical evaluation, healthier lifestyle, and regular checkups; meanwhile advances in AI/robotics are expanding fertility treatment options.