1. Department of Obstetric-Gynaecologic Nursing, Pomeranian Medical University in Szczecin, Szczecin , Poland
2. Gynaecological-Obstetrical Ward, Regional Hospital of Kołobrzeg, Łopuskiego 31, 78-100 Kołobrzeg , Poland
3. Obstetrics and Gynaecology Clinic, Pomeranian Medical University in Szczecin, Szczecin , Poland