Ludwig Kiesel, MD, PhD, is chairman of the Department of Gynaecology and Obstetrics at the University of Muenster, Germany. He studied medicine in Heidelberg,Germany and in London, UK followed by a research fellowship at NIH in Bethesda, Maryland,USA. He is the president of German Society of Gynaecological Endocrinology and Fertility Disorders, the past president of the German Menopause Society as well as of the German Endometriosis Research Foundation (SEF). He previously served as a board member of the European Menopause and Andropause Society (EMAS) and the World Endometriosis Society (WES). He has been involved in national and international guidelines on menopause, contraception, endometriosis and endometrial cancer. His research interests focus on hormonal treatment in menopause and endometriosis as well as the mechanisms of cell proliferation and invasion in the pathogenesis of endometriosis. He has performed trials in the fields of endometriosis, oncology, menopause and endocrinology. The main aspect of his clinical work is endoscopic surgery in benign and malignant diseases..