Sentences with phrase «non-obstructive azoospermia»

Non-obstructive azoospermia refers to no sperm in the semen because of abnormal sperm production.

But new research led by University of Pennsylvania scientists suggests that mutations in an X chromosome gene called TEX11 are responsible for a significant number of cases of infertility — an estimated 1 percent of cases of non-obstructive azoospermia.