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Related Experiment Video

Updated: May 10, 2026

Mouse Model of Surgical Uterine Injury and Subsequent Pregnancy Outcomes
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Placenta praevia after prior caesarean section: an exploratory case-control study.

Tin Lok Chiu1, Lynn Sadler, Michelle R Wise

  • 1National Women's Hospital, Auckland, New Zealand.

The Australian & New Zealand Journal of Obstetrics & Gynaecology
|June 7, 2013
PubMed
Summary

Monofilament sutures and performing caesarean sections in the first stage of labor are associated with a reduced risk of placenta previa in subsequent pregnancies. These findings offer insights for optimizing surgical practices to improve maternal health outcomes.

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Surgical Outcomes Research

Background:

  • Placenta previa is a significant complication of pregnancy, particularly in women with a history of caesarean section.
  • Identifying modifiable risk factors associated with placenta previa is crucial for improving obstetric outcomes.

Purpose of the Study:

  • To investigate specific factors related to prior caesarean sections that may influence the risk of developing placenta previa.
  • To identify additional risk factors for placenta previa in women undergoing repeat caesarean deliveries.

Main Methods:

  • Retrospective case-control study involving 53 cases of placenta previa and 157 controls.
  • Analysis of data from the National Women's database (2004-2009).
  • Assessment of hysterotomy closure suture type, stage of labor during prior C-section, surgeon experience, and funding model as potential risk factors.
Keywords:
caesarean sectionmonofilament sutureplacenta praeviastage of labour

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Main Results:

  • Use of monofilament suture for hysterotomy closure in a prior caesarean section was associated with a significantly reduced risk of placenta previa (aOR 0.26).
  • Prior caesarean section performed during the first stage of labor also decreased the likelihood of placenta previa (aOR 0.36).
  • No significant association was found between the type of primary surgeon or the funding model of the prior caesarean section and the risk of placenta previa.

Conclusions:

  • Performing a prior caesarean section in the first stage of labor is linked to a lower incidence of placenta previa.
  • Employing monofilament sutures for hysterotomy closure during caesarean delivery may mitigate the risk of developing placenta previa in future pregnancies.