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. 2015 Oct 15;1:15. doi: 10.1186/s40738-015-0008-z

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© Panelli et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 6 — Cervical ectopic pregnancy by transvaginal ultrasound. Doppler shows circumferential flow. The arrow indicates Doppler flow inside the gestational sac, associated with the embryo. Such Doppler flow will not be found in a spontaneous abortion, which may slide down into a similar position at the cervix