Placenta Previa with Prior Uterine Incisions:
Effect on Incidence of Placenta Accreta
Number of Prior Uterine Incisions
 Percent with Placenta Accreta
0
5
1
24
2
47
3
40
4
67

Clark SL, Koonings PP, Phelan JP. Placenta previa/accreta and prior cesarean section. Obstet Gynecol 1985 Jul;66(1):89-92