"Azoospermia" is a medical term used to describe a condition where a man has no sperm in his semen. In simpler terms, it means a man cannot make a baby because his semen does not contain any sperm. Full definition
To further extend these findings» implications for humans, Wang's team screened genomic samples from 246 men with azoospermia as well as others to serve as controls, looking for variations in the TEX11 gene. (sciencedaily.com)
In total, from the screening of 275 men, researchers found three mutations in TEX11 that appeared to be the cause of the infertility, resulting in a rate of about 1 percent of cases of azoospermia. (sciencedaily.com)
The infertile men in the study each had a type of genetic mutation that prevented them from making mature sperm — a condition called azoospermia. (sciencedaily.com)