Ishibashi H, Miyamoto M, Iwahashi H, Matsuura H, et al. Criteria for placenta accreta spectrum in the International Federation of
Gynecology and Obstetrics classification, and topographic invasion area are
associated with massive hemorrhage in the patients with placenta previa. Acta Obstet Gynecol Scand 2021 Mar 13. doi: 10.1111/aogs.14143.
PMID: 33715171