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The risk of placenta accreta following primary cesarean delivery

  • Maternal-Fetal Medicine
  • Published:
Archives of Gynecology and Obstetrics Aims and scope Submit manuscript

Abstract

Objective

To (a) evaluate the risk for placenta accreta following primary cesarean section (CS), in regard to the stage of labor, the cesarean section was taken (elective prelabor vs. unplanned during labor); and (b) investigate whether the association between placenta accreta and maternal and neonatal complications is modified by the type of the primary CS.

Study design

In a population-based retrospective cohort study, we included all singleton deliveries occurred in Soroka University Medical Center between 1991 and 2015, of women who had a history of a single CS. The deliveries were divided into three groups according to the delivery stage the primary CS was carried out: ‘Unplanned 1’ (first stage—up to 10 cm), ‘Unplanned 2’ (second stage—10 cm) and ‘Elective’ prelabor CS. We assessed the association between the study group and placenta accreta using logistic generalized estimation equation (GEE) models. We additionally assessed maternal and neonatal complications associated with placenta accreta among women who had elective and unplanned CS separately.

Results

We included 22,036 deliveries to 13,727 women with a history of one CS, of which 0.9% (n = 207) had placenta accreta in the following pregnancies: 12% (n = 25) in the ‘Unplanned 1’ group, 7.2% (n = 15) in the ‘ Unplanned 2’ group and 80.8% (n = 167) in the ‘elective’ group. We found no difference in the risk for subsequent placenta accreta between the groups. In a stratified analysis by the timing of the primary cesarean delivery, the risk for maternal complications, associated with placenta accreta, was more pronounced among women who had an unplanned CS (OR 27.96, P < 0.01) compared to women who had an elective cesarean delivery (OR 13.72, P < 0.01).

Conclusions

The stage in which CS is performed has no influence on the risk for placenta accreta in the following pregnancies, women who had an unplanned CS are in a higher risk for placenta accrete-associated maternal complications. This should be taken into consideration while counselling women about their risk while considering trial of labor after cesarean section.

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Acknowledgements

Gil Zeevi wrote the first draft of the manuscript. No honorarium, Grant, or other form of payment was given to anyone to produce the manuscript.

Funding

This study was not funded.

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Authors and Affiliations

Authors

Contributions

GZ: data collection, manuscript writing. RH: project development and management, manuscript editing. DT: manuscript editing, project management. JB: project development and consultant. MYS: data analysis (lead). AS: data collection (support), data analysis

Corresponding author

Correspondence to Gil Zeevi.

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The authors report no conflict of interest.

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Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Ethical approval was obtained by the review board of the Soroka University Medical Center.

Human rights and participant statement

This article does not contain any studies with animals performed by any of the authors.

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Zeevi, G., Tirosh, D., Baron, J. et al. The risk of placenta accreta following primary cesarean delivery. Arch Gynecol Obstet 297, 1151–1156 (2018). https://doi.org/10.1007/s00404-018-4698-4

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  • DOI: https://doi.org/10.1007/s00404-018-4698-4

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