1. Department of Obstetrics and Gynecology; University of Pernambuco; Recife-PE Brazil
2. Department of Obstetrics and Gynecology; Faculty of Medicine of São José do Rio Preto; São José do Rio Preto-SP Brazil
3. Ultramater Clinic; Recife-PE Brazil
4. Department of Obstetrics; Paulista School of Medicine - Federal University of São Paulo (EPM-UNIFESP); São Paulo-SP Brazil