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• Chattopadhyay SK, Kharif H, Sherbeeni MM. Placenta praevia and accreta after previous cesarean section. Eur J Obstet Gyne- col 1993; 52:151-156.
• Crane JM, van den Hof MC, Dodds L, Armson BA, Liston R. Neonatal outcomes with placenta previa. Obstet Gynecol 1999; 93:541-544.
• Frederiksen MC, Glassenberg R, Stika CS. Placenta previa: A 22-year analysis. Am J Obstet Gynecol 1999; 180:1432-1437.
• Ilan E, Timor-Tritsch I, Roland A, Yums S. Confirming the sa- fety of transvaginal sonography in patients suspected of placen- ta previa. Obstet Gynecol 1993; 81:742-744.
• Iyasu S, Saftlas AK, Rowley DL, Koonin LM, Lawson HW, At- rash HK. The epidemiology of placenta previa in the United Sta- tes, 1979 through 1987. Am J Obstet Gynecol 1993; 168:1424- 1429.
• Leerentveld RA, Gilberts EC, Arnold MJ, Wladimiroff JW. Ac- curacy and safety of transvaginal sonographic placental localiza- tion. Obstet Gynecol 1990; 76:759-762.
• Love CD, Wallace EM. Pregnancies complicated by placenta previa. What is the appropriate management? Br J Obstet Gyne- col 1996; 103:864-867.
• McShane PM, Heyl PS, Epstein MF. Maternal and perinatal mortality resulting from placenta previa. Obstet Gynecol 1985; 65:176-182.
• Miller DA, Chollet JA, Goodwin TM. Clinical risk factors for placenta previa-placenta accreta. Am J Obstet Gynecol 1997; 177:210-214.
• Mouer JR. Placenta previa : antepartum conservative manage- ment, inpatient versus outpatient. Am J Obstet Gynecol 1994; 170:1683-1685.
• Townsend RP, Laing FC, Nyberg DA. Technical factors respon- sible for placental migration: sonographic assessment. Radi- ology 1986; 160:105-108.