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Related Experiment Videos

Placenta previa and previous cesarean section

W W To1, W C Leung

  • 1Department of Obstetrics and Gynecology, University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong.

International Journal of Gynaecology and Obstetrics: the Official Organ of the International Federation of Gynaecology and Obstetrics
|October 1, 1995
PubMed
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Previous cesarean sections significantly increase the risk of developing placenta previa and placenta accreta. Women with placenta previa and a history of cesarean delivery face a substantially higher risk of placenta accreta.

Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Reproductive Health

Background:

  • Previous cesarean delivery is a known risk factor for placental abnormalities.
  • Understanding the specific risks associated with cesarean history is crucial for improved obstetric care.

Purpose of the Study:

  • To evaluate the association between prior cesarean section and the development of placenta previa.
  • To assess the relationship between previous cesarean section and placenta previa with accreta.

Main Methods:

  • Retrospective review of delivery records from 1984 to 1993.
  • Analysis of 50,485 deliveries, identifying cases of placenta previa.
  • Comparison of placenta previa and accreta incidence based on cesarean delivery history.

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Main Results:

  • The incidence of placenta previa was higher in women with previous cesarean sections (1.31%) compared to those with unscarred uteri (0.75%).
  • Risk of placenta previa increased with the number of prior cesarean sections.
  • Placenta accreta incidence was significantly elevated in women with previous cesarean scars, with a 35-fold higher relative risk.

Conclusions:

  • A strong association exists between previous cesarean section and placenta previa, as well as placenta previa accreta.
  • Patients diagnosed with placenta previa and a history of cesarean delivery should be considered high-risk for placenta accreta.