1. Department of Prenatal Cardiology Polish Mother's Memorial Hospital Research Institute, Lodz , Poland
2. Department of Obstetrics, Perinatology and Gynaecology Polish Mother's Memorial Hospital Research Institute, Lodz , Poland
3. Department of Diagnosis and Prevention of Fetal Malformations, Medical University, Lodz , Poland
4. Department of Pediatric Cardiology, Polish Mother's Memorial Hospital Research Institute, Lodz , Poland
5. Faculty of Health Sciences, The State University of Applied Sciences in Plock, Plock , Poland