1. Department of Midwifery, Medical School, Qom University of Medical Sciences, Qom, Iran
2. Department of Gynecology and Midwifery, Medical School, Qom University of Medical Sciences Qom, Iran
3. Department of Midwifery, School of Nursing and Midwifery, Maternal-fetal medicine Research Center, Shiraz University of Medical Sciences, Shiraz, Iran