1) 日本産科婦人科学会/日本産婦人科医会(編) : 産婦人科診療ガイドライン─産科編 2014,CQ106-2,CQ304.日本産科婦人科学会,2014
2) Mustafá SA, et al : Transvaginal ultrasonography in predicting placenta previa at delivery : a longitudinal study. Ultrasound Obstet Gynecol 20 : 356─359, 2002
3) Predanic M, et al : A sonographic assessment of different patterns of placenta previa “migration” in the third trimester of pregnancy. J Ultrasound Med 24 : 773─780, 2005
4) Ghourab S, et al : Placental migration and mode of delivery in placenta previa : transvaginal sonographic assessment during the third trimester. Ann Saudi Med 20 : 382─385, 2000
5) Cho JY, et al : Difference in migration of placenta according to the location and type of placenta previa. J Clin Ultrasound 36 : 79─84, 2008