1 Olof Asta Olafsdottir is an Assistant Professor at the Department of Midwifery, Faculty of Nursing, Health Care Sciences, University of Iceland. She can be reached via e-mail at olofol@hi.is Zhaoxia Huang is a Nurse Manager, Reproductive Medical Center of the Number 2 Affiliated Hospital of Wenzhou University Medical Center. She can be reached via e-mail at aurora917@126.com.