Uterine scarring: Women with a history of fibroid surgery or previous ceasarean whose placenta implants on scar tissue have a small, but present potential for the placenta to dig in too deeply. It can just happen de novo, too.
Answered 10/1/2013
5.9k views
Previa/fibroids/scar: Placenta previa (placenta covering the cervix and obstructing the birth canal) is most closely etiologic to placenta accreta. Degenerating uterine fibroids, having had many babies, prior scars on the womb (e.g. Myomectomies, cesarean sections) and multiple d&cs can also lead to placenta accreta with or without placenta previa.
Answered 12/9/2013
5.8k views
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