Dr. Karl Hansen (IMAGE) University of Oklahoma Caption Karl Hansen, M.D., Ph.D., is chair of the Department of Obstetrics and Gynecology at the University of Oklahoma College of Medicine. Credit University of Oklahoma Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.