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. 2021 Dec 14;8:767748. doi: 10.3389/fmed.2021.767748

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Copyright © 2021 Lu, Chu, Wang, Xu, Zhao, Tao, Li and Ma.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Doppler findings in patients with severe placenta accreta spectrum with previa. (A) The red arrow shows retroplacental myometrial thickness <1 mm and irregularity of the uterine-bladder interface. (B) The red arrow shows intraplacental vascular lacunae. (C) The red arrow shows hypervascularity of the uterine-placental margin and uterine serosa-bladder wall interface. (D) The red arrow shows hypervascularity of the uterine serosa-bladder wall interface. (E) The red arrow shows cervical hypervascularity. PAS, placenta accreta spectrum.