1 Department of Perinatology and Gynaecology, Poznan University of Medical Sciences, Poznan, Poland. annaszerszen@wp.pl.
2 Department of Perinatology and Gynaecology, Poznan University of Medical Sciences, Poznan, Poland.
3 Clinical Department of Obstetrics and Gynecology, Chair of Women's Health, School of Health Sciences, Medical University of Silesia, Katowice, Poland.