Astrid Berger1, Magdalena Ritter2, Siegfried Fessler2. 1. Department of Gynecology and Obstetrics, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria. Astrid.Berger@i-med.ac.at. 2. Department of Gynecology and Obstetrics, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.