D L Rolnik1, D Wertaschnigg1, B Benoit2,3, S Meagher4. 1. Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia. 2. Centre Femme Mère Enfant, Hôpital de l'Archet 2, Nice, France. 3. Hôpital Princesse Grace, Monaco, Principality of Monaco. 4. Monash Ultrasound for Women, Melbourne, Australia.