1. Department of Obstetrics and Gynecology, Moulins-Yzeure Hospital, 10 Av. du Général de Gaulle, 03006 Moulins, France
2. Department of Obstetrics and Gynecology, Francois Quesnay Hospital, 78201 Mantes-la-Jolie, France
3. Department of Molecular and Reproductive Medicine, University of Siena, 53100 Siena, Italy