1. Department of Obstetrics and Gynecology; Angers University Hospital; Angers
2. Department of Obstetrics and Gynecology; Maternité Port-Royal Hospital; Cochin APHP, University René Descartes; Paris
3. Department of Obstetrics and Gynecology; Louis Mourier Hospital, APHP, University Paris-Diderot; Colombes; France