1. Department of Obstetrics and Gynecology, University Hospital and Masaryk University, Brno , Czech Republic
2. Sanatorium Pronatal, Prague , Czech Republic
3. Department of Obstetrics and Gynecology, 2nd Medical Faculty, Charles University Prague, Praga , Czechia
4. Repromeda, Brno , Czech Republic
5. Department of Histology and Embryology, University of Medical Sciences, Poznan , Poland
6. Department of Anatomy, University of Medical Sciences, Poznan , Poland