Placenta Accreta Spectrum is defined as abnormal adherence of the placenta to the myometrium due to defective decidua basalis formation.

Placenta Accreta Spectrum is defined as abnormal adherence of the placenta to the myometrium due to defective decidua basalis formation.

• A. Abnormal adherence of the placenta to the myometrium due to defective decidua basalis formation
• B. Normal placental implantation
• C. Detachment without bleeding
• D. Vasa previa

Answer: (A)

Placental implantation relies on a healthy decidua basalis to limit how deeply placental villi invade the uterine wall. When the decidua basalis is defective, the placental tissue adheres to and can invade into the myometrium, producing placenta accreta spectrum. This spectrum includes accreta (adheres to the myometrium), increta (invades into the myometrium), and percreta (penetrates through the myometrium to the serosa or beyond). The description given matches this pathophysiology. Other options describe normal implantation, detachment without bleeding, or vasa previa, which are not correct for this definition. This condition increases the risk of severe hemorrhage at delivery and often necessitates careful planning, sometimes cesarean hysterectomy, to manage bleeding.

Placental implantation relies on a healthy decidua basalis to limit how deeply placental villi invade the uterine wall. When the decidua basalis is defective, the placental tissue adheres to and can invade into the myometrium, producing placenta accreta spectrum. This spectrum includes accreta (adheres to the myometrium), increta (invades into the myometrium), and percreta (penetrates through the myometrium to the serosa or beyond). The description given matches this pathophysiology. Other options describe normal implantation, detachment without bleeding, or vasa previa, which are not correct for this definition. This condition increases the risk of severe hemorrhage at delivery and often necessitates careful planning, sometimes cesarean hysterectomy, to manage bleeding.