Placenta previa with early opening of the uterine isthmus is associated with high risk of bleeding during pregnancy, and massive haemorrhage during caesarean delivery., GOTO Minako;HASEGAWA Junichi;ARAKAKI Tatsuya;TAKITA Hiroko;OBA Tomohiro;NAKAMURA Masamitsu;SEKIZAWA Akihiko, Eur J Obstet Gynecol Reprod Biol, 201:7 - 11, Jun. 2016, Peer-reviewed