A Ludwin1,2, I Ludwin2, W P Martins3,4. 1. Department of Gynecology and Oncology, Jagiellonian University, Krakow, Poland. 2. Ludwin & Ludwin Gynecology, Private Medical Center, Krakow, Poland. 3. SEMEAR Fertilidade, Reproductive Medicine, Ribeirão Preto, Brazil. 4. Department of Obstetrics and Gynecology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.