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Placenta Accreta Spectrum: What Has Changed?

Last updated: 25 October 2026 · Editor: Sadık Kükrer, MD

With placenta previa, accreta risk rises with the number of prior cesareans: 3%, 11%, 40%, 61% and 67% for 0, 1, 2, 3 and ≥4 cesareans (Silver 2006; previa n=723).
Ultrasound findings are reported with standardized descriptors (EW-AIP; Collins 2016).
The FIGO 2019 clinical classification is used (Jauniaux 2019).
Ultrasound sensitivity 90.7% and specificity 96.9% (D'Antonio 2013); MRI sensitivity 94.4% and specificity 84.0% (D'Antonio 2014). No significant difference between the two methods was shown.

References

Silver RM, et al. Obstet Gynecol. 2006;107(6):1226-1232. doi:10.1097/01.AOG.0000219750.79480.84. PMID: 16738145.
Collins SL, et al. Ultrasound Obstet Gynecol. 2016;47(3):271-275. doi:10.1002/uog.14952. PMID: 26205041.
Jauniaux E, et al. Int J Gynaecol Obstet. 2019;146(1):20-24. doi:10.1002/ijgo.12761. PMID: 31173360.
D'Antonio F, et al. Ultrasound Obstet Gynecol. 2013;42(5):509-517. doi:10.1002/uog.13194. PMID: 23943408.
D'Antonio F, et al. Ultrasound Obstet Gynecol. 2014;44(1):8-16. doi:10.1002/uog.13327. PMID: 24515654.

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