Placenta previa is most strongly associated with which placental attachment disorder?

• A. Placenta accreta
• B. Placenta increta
• C. Placenta percreta
• D. Uterine atony

Answer: (A)

Placenta previa creates an implantation site in the lower uterine segment where the decidual layer is often deficient. That defective decidua allows placental villi to attach abnormally to the myometrium, leading to placenta accreta spectrum. Among the attachment disorders, placenta accreta (where the placenta adheres to the myometrium) is the most commonly associated with previa. Deeper invasion like increta or percreta can occur but are less frequent. Uterine atony, on the other hand, is a separate cause of postpartum hemorrhage and not a placental attachment disorder.