1. Department of Gynecology and Obstetrics, Federal University of Minas Gerais, Minas Gerais, Brazil
2. High Risk Pregnancy Study Group, Federal University of Minas Gerais, Minas Gerais, Brazil
3. Department of Physiology and Biophysics, Federal University of Minas Gerais, Minas Gerais, Brazil
4. Department of Pathology, Federal University of Minas Gerais, Minas Gerais, Brazil