The Effect of Testosterone on Experimental Endometriosis in Rhesus Monkeys**Presented at the Eighty-second Annual Meeting of the American Gynecological Society, Hot Springs, Va., May 21-23, 1959.††This investigation was supported by Research Grant C-2892 from the National Cancer Institute, U.S. Public Health Service. The testosterone was provided by Ayerst Laboratories, New York, through the courtesy of the Medical Director, Dr. John B. Jewell.