1. Department of Obstetrics and Gynecology, Liv Hospital, Ankara, Turkey;
2. Gurgan Clinic, IVF, Ankara, Turkey;
3. Koc Universitesi Tip Fakultesi, Istanbul, Turkey;
4. Koru Hospital, Ankara, Turkey;
5. Department of Biostatistics, Yildirim Beyazit Universitesi, Ankara, Turkey