1 Department of obstetrics and gynecology, CHU Lille, F-59000 Lille, France; Lille University, Faculty of medicine, F-59000 Lille, France. Electronic address: sandy.hanssens@chru-lille.fr.
2 Department of obstetrics and gynecology, CHU Lille, F-59000 Lille, France.
3 Department of radiology, CHU Lille, F-59000 Lille, France; Lille University, Faculty of medicine, F-59000 Lille, France.
4 Department of obstetrics and gynecology, CHU Lille, F-59000 Lille, France; Lille University, Faculty of medicine, F-59000 Lille, France.