1. Department of Gynecology, Obstetrics and Oncological Gynecology, The Medical University of Silesia in Katowice, Markiefki 87, 40-211 Katowice, Poland
2. Department of Neonatology, Municipal Hospital in Ruda Śląska, Wincentego Lipa 2, 41-703 Ruda Śląska, Poland