Researchers from the University of Southern Denmark have suggested that sleeping badly may be linked to male fertility problems. They looked at the sleep patterns of more than 900 Danish men and found that those who had less than six hours sleep a night or suffered from disturbed sleep were more likely to have a poor quality sperm.
Before you dash off to the sleep clinic, what the team don’t know is whether improving sleep patterns for these individuals would lead to an improvement in sperm quality. You might also be reassured by comments on this story in the Daily Mail from Dr Allan Pacey, a leading UK expert on the subject, who said that men should not be worried by this research as it was unlikely that poor sleep would have a major impact on fertility
You can find a link to the paper itself here.