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. 2023 Feb 14;30(17):49779–49797. doi: 10.1007/s11356-023-25661-x

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© The Author(s) 2023

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — Photomicrographs of a ventral view of the sternum of the 19th day of gestation rat fetuses. A Control sternum showing six fully ossified sternebrae (st), the cartilaginous sternal portion of ribs (rb), manubrium (ma), and xiphoid process (xp). B Sternum of fetus maternally treated with a low dose of MSG showing faintly stained cartilaginous parts of sternebrae (st) and a sternal portion of ribs (rb). C Sternum of fetus maternally treated with a high dose of MSG showing complete delay in chondrification in both sternum and ribs besides the absence of xiphoid cartilage (xp) (7X)