OC01.09: Interest of an off‐line US‐US fusion technique to better explore the fetal brain and its development. Issue Volume 58:Issue S1(2021)Supplement (14th October 2021) - Codaccioni, C.; Arthuis, C.J.; Henry, C.; Bault, J.; Deloison, B.; Stas, J.; Potelle, G.; Bussieres, L.; Goupil, S.; Ville, Y.; Grevent, D.; Salomon, L.J.