tResearchers are testing an experimental injection for endometriosis in macaques. Image credit: Anna Efetova/Getty Images. Endometriosis affects around 10% of females of reproductive age worldwide. In people with endometriosis, tissue similar to the endometrium, or uterine lining, grows outside the uterus, causing severe period pain and heavy bleeding, and, in some, infertility. This tissue can form lesions, scar...
