1. Department of Histology and Embryology, Hacettepe University Faculty of Medicine, Ankara, Turkey;
2. Department of Obstetrics and Gynecology, Division of Perinatology, Hacettepe University Faculty of Medicine, Ankara, Turkey;
3. College of Science, Engineering and Health, Lecturer of Statistics, RMIT University, Melbourne, Australia;
4. Department of Histogy and Embryology, TOBB University Faculty of Medicine, Ankara, Turkey