Abnormally invasive placenta (AIP) is a rare and sometimes fatal condition during pregnancy. Abnormally invasive placenta usually is caused by placental implantation over a uterine scar from a previous uterine surgery, most commonly a cesarean section (CS). Abnormally invasive placenta has a maternalmortality rate as high as 5 when undiagnosed. The greatest risk factors for AIP are placenta previa and cesarean delivery in a prior pregnancy. The primary objective of this study was to determine the location of the CS scar in postpartum women who delivered by prelabor or early-labor CS or by intrapartum CS. The secondary objective was to assess the existence of a scar niche in these patients.
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