1. Department of Perinatology Etlik Zubeyde Hanim Women's Health Care, Training and Research Hospital, University of Health Sciences Ankara Turkey
2. Department of Obstetrics and Gynecology Gazi University Faculty of Medicine Ankara Turkey
3. Department of Obstetrics and Gynecology Etlik Zubeyde Hanim Women's Health Care, Training and Research Hospital, University of Health Sciences Ankara Turkey