title: Abnormal placental invasion experience at 1 center.
abstract: OBJECTIVE
  To identify the incidence, risk factors, and maternal and neonatal outcome of pregnancies with abnormal placentation at a single center.
  
  
  METHODS
  A retrospective review of the medical records of the deliveries in 1999-2003 at the Department of Obstetrics, University Hospital Zurich, was conducted with respect to abnormal placentation, and the incidence, risk factors and outcomes were observed.
  
  
  RESULTS
  Thirty-one women with abnormal placentation were identified. They represented 0.31% of deliveries during the 5-year period. The significant factors associated with abnormal placentation were previous uterine curettage (OR = 19.3, 95% CI 11.6-32.3), previous uterine surgery other than cesarean sections (OR = 49.6, 95% CI 24.3-102.3) and coexistent placenta previa (OR = 16.1, 95% CI 4.7-43.7). No case of maternal death occurred, and 1 neonatal death due to uterine rupture occurred in the study group.
  
  
  CONCLUSIONS
  The most important risk factor in abnormal placentation was a previous uterine intervention.
authors: Department of Obstetrics, University Hospital Zurich, Frauenklinikstr. 10, CH-8091 Zurich, Switzerland. gabriela.bencaiova@usz.ch
authors: Gabriela
authors: G
authors: Bencaiova
authors: Tilo
authors: T
authors: Burkhardt
authors: Ernst
authors: E
authors: Beinder
mesh_terms: D002585:Cesarean Section / Q000009:adverse effects; D003475:Curettage / Q000009:adverse effects; D005260:Female; D006801:Humans; D015994:Incidence; D007226:Infant Mortality; D007231:Infant, Newborn; D008423:Maternal Age; D008499:Medical Records; D010921:Placenta Accreta / Q000000981:diagnostic imaging / Q000453:epidemiology*; D010923:Placenta Previa / Q000000981:diagnostic imaging / Q000453:epidemiology*; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D013557:Switzerland / Q000453:epidemiology; D014463:Ultrasonography