Harald Krentel is specialist for Gynecology and Obstetrics, certified Gynecological Oncologist and certified specialist in Minimally Invasive and in Robotic Gynecological Surgery. He is specialized in surgery of deep endometriosis and gynecological cancer. He is director of the Department of Gynecology, Obstetrics and Gynecological Oncology at Bethesda Hospital Duisburg, Germany, which is a certified center for gynecological cancer, breast cancer and deep endometriosis and adenomyosis surgery.Director of Clinic for Gynecology, Obstetrics and Gynecological Oncology, Bethesda Hospital Duisburg, Germany / Head of Gynecological Cancer Center, Bethesda Hospital, Duisburg, Germany / Associate Professor at Department for Gynecology at Carl-von-Ossietzky University, Oldenburg, Germany / Visiting Professor for Gynaecology and Obstetrics at Universidad Peruana Cayetano Heredia, Lima, Peru / Visiting Professor for Gynecology at UNAM and InPer, Mexico City / Past President of European Endometriosis League / Vice-Chair of ESGE Special Interest Group Endometriosis / Member of Advisory Board, German scientific endometriosis foundation