In the most severe form of male infertility, men do not make any measurable levels of sperm. This condition, called azoospermia, affects approximately 1 percent of the male population and is responsible for about a sixth of cases of male infertility.  Often men with azoospermia don’t know the underlying cause of their condition. Now, a new study from researchers at University of Pennsylvania, St. Luke’s Hospital, … Continue reading Researchers identify a new gene responsible for male infertility.