If you have problems with your sperm, you may have bigger things to worry about than potential infertility. New research from Stanford University shows that there is a correlation between semen defects and premature death. In the eight-year study, men who had problem with their semen, such as low sperm count or irregular movement, were two times more likely to die prematurely than men with normal semen. Even when controlling for other factors, like heart disease and diabetes, the correlation was still there. However, the news isn't entirely surprising. Past studies have indicated a relationship between infertility and heart disease, and researchers suspect that men with sperm defects may have a higher risk for undiagnosed health issues.