The Interdisciplinary Research Unit of Women's, Children's and Families' Health, The Juliane Marie Centre, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen Ø, Denmark; Antalya Bilim University, Faculty of Health Sciences, Department of Midwifery, No:290 A Dösemealti, 07121 Antalya, Turkey.