New research into causes of male infertility

Researchers in the United States have found evidence that male infertility may have genetic causes which are set from before a man is born.

The team at the University of Southern California looked at sperm DNA from men at fertility clinics, and they found differences between those with fertility problems and those with normal sperm counts. Their findings suggest that the way DNA is processed may be a cause.

The research is quite complicated if you aren't science-minded, but for more details of the study, you can see the press release from the University here