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To the Editor: Placenta accreta (accreta, increta, or percreta) is challenging: effort to reduce its incidence is of paramount importance. We already know well that cesarean section (CS) increases the risk of accreta in the subsequent pregnancy; however, we do not know well what sort of CS is more/less likely to cause accreta. We read with great interest the article by Shi et al.:[1] CS without labor onset (elective) is more likely to cause placenta previa accreta than that after labor onset (emergent). We have some clarifications.