placenta accreta spectrum
Wikipedia Summary
Placenta accreta occurs when all or part of the placenta attaches abnormally to the myometrium (the muscular layer of the uterine wall). Three grades of abnormal placental attachment are defined according to the depth of attachment and invasion into the muscular layers of the uterus:
Accreta – chorionic villi attached to the myometrium, rather than being restricted within the decidua basalis.
Increta – chorionic villi invaded into the myometrium.
Percreta – chorionic villi invaded through the perimetrium (uterine serosa).
Because of abnormal attachment to the myometrium, placenta accreta is associated with an increased risk of heavy bleeding at the time of attempted vaginal delivery...
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