1. INSERM, U780, IFR69, Villejuif, France
2. University Paris–Sud, Orsay, France
3. Assistance Publique–hôpitaux de Paris, Department of Obstetrics and Gynaecology, University Hospital of Bichat Claude Bernard, Paris, France
4. Department of Obstetrics and Gynaecology, Regional Maternity, University Hospital of Nancy, Nancy, France
5. Department of Obstetrics and Gynaecology, University Hospital of Poitiers, Poitiers, France
6. Avenir Team, INSERM-University J. Fourier Joint Research Center, U823, Institut Albert Bonniot, La Tronche, Grenoble, France