Effect of placental attachment to previous cesarean section incision site on pregnancy outcomes in patientsWe studied the effect of placental attachment to the incision site on pregnancy outcomes. To eliminate the different effects of placental attachment to the anterior or posterior wall, here we only studied cases of placental attachment to the anterior wall. The results are shown in Table 3. We found that placental attachment to the incision site had little effect on the pregnancy outcome. However, the incidence of complete placenta previa and PAS disorders was significantly higher in patients with placental attachment to the incision site compared to patients with no attachment to incision site.