Christl Reisenauer1, Jürgen Andress2. 1. Department of Gynecology and Obstetrics, University Hospital Tuebingen, Calwerstrasse 7, 72076, Tuebingen, Germany. Christl.reisensuer@med.uni-tuebingen.de. 2. Department of Gynecology and Obstetrics, University Hospital Tuebingen, Calwerstrasse 7, 72076, Tuebingen, Germany.