Misgav Rottenstreich1, Hen Y Sela2. 1. Department of Obstetrics and Gynecology, Shaare Zedek Medical Center, Affiliated with the Hebrew University Medical School of Jerusalem, Jerusalem, Israel. Electronic address: rmisgav@szmc.org.il. 2. Department of Obstetrics and Gynecology, Shaare Zedek Medical Center, Affiliated with the Hebrew University Medical School of Jerusalem, Jerusalem, Israel.