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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. 3 — Photomacrograph of the 19th day of gestation full fetal rat skeleton double stained with Alizarin red S and Alcian Blue stains, showing differentiation of bone and cartilage (stain bone red and cartilage blue). A Control. B Rat fetuses maternally treated with a low-dose of MSG. C Rat fetuses maternally treated with a high dose of MSG. Skull (s), forelimb (fl ), ribs (rb), vertebral column (vc), hindlimb (hl), and caudal vertebra (cv)