A study in the Journal of Fertility and Sterility looked at 361 seeking infertility treatment. On average, the more time they spent on their cell phones, the lower their sperm count and the greater their percentage of abnormal sperm.
The concern is that over time the electromagnetic energy emitted from the phones could damage body tissue and DNA. The findings add to questions about the potential health effects of wireless devices.
This study only shows an association and does not prove cell phones damage sperm.