1. Department of Anatomy, Poznań University of Medical Science, Poznań, Poland.
2. Department of Histology and Embryology, Poznań University of Medical Science, Poznań, Poland.
3. Institute of Veterinary, Poznań University of Life Sciences, Poznań, Poland.
4. Department of Obstetrics and Gynecology, University Hospital and Masaryk University, Brno, Czech Republic.