1. Department of Anatomy, Poznań University of Medical Sciences , Poznań , Poland
2. Department of Histology and Embryology, Poznań University of Medical Sciences , Poznań , Poland
3. Division of Perinatology and Women’s Diseases, Poznań University of Medical Sciences , Poznań , Poland
4. Department of Obstetrics and Gynecology, Faculty of Medicine, Masaryk University and University Hospital Brno , Brno , Czech Republic
5. Department of Nursing and Midwifery, Faculty of Medicine, Masaryk University , Brno , Czech Republic
6. Physiology Graduate Program, North Carolina State University , Raleigh, NC , USA
7. Department of Veterinary Sciences, Czech University of Life Sciences in Prague , Prague , Czech Republic