1 Department of Obstetrics and Gynecology, Poissy-Saint Germain Hospital, Versailles-St Quentin University, Poissy, France. Electronic address: cthuillier@chi-poissy-st-germain.fr.
2 Department of Obstetrics and Gynecology, Poissy-Saint Germain Hospital, Versailles-St Quentin University, Poissy, France.