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. 2022 Jan 21;12:806902. doi: 10.3389/fmicb.2021.806902

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Copyright © 2022 Zhu, Du, Wang, Huang, Hu, Lu, Li, Zhu, Qu, Cai, Liu and Du.

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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Fluorescence in situ hybridization (FISH) detection of SARS-CoV-2 mRNA. Mock lung (A) and corresponding HE (B). Infected lung (C) and corresponding HE from the non-pregnant (D) and pregnant (E) mouse. Infected non-pregnant uterus (F) and corresponding HE (G). (H) The SARS-CoV-2 mRNA relative quantitation of the uterus of non-pregnancy (n = 6) and pregnancy (n = 6), fetuses (n = 3), and placenta (n = 3) in infected mice. The SARS-CoV-2 RNA in fetuses and placenta had not been detected. NP, non-pregnancy; P, pregnancy; and Infected placenta (I) and corresponding HE (J).