Just as with many other aspects of our health, psychological stress can also affect reproduction. "As a population, those with the highest stress scores have the lowest semen parameters," says Dr. Thomas J. Walsh. Men dealing with lots of emotional stress – including that brought about by fertility problems – tend to have lower-quality semen. There are many ways to deal with stress. Whether you choose to use online relaxation tips or seek professional health, it's always smart to consult with your doctor.