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. 2022 Jul 21;11:e78277. doi: 10.7554/eLife.78277

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© 2022, Matsuo, Yuan, Kim et al

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Figure 3. — (a) Fluorescence in situ hybridization of Msx1 in days 4 and 8 pregnant uteri from Foxa2^f/f, Foxa2^f/fLtf^Cre+, and Foxa2^f/fPgr^Cre+ females. Scale bar: 200 μm. (b) Epidermal growth factor receptor (EGFR) immunostaining on dormant blastocysts. Positive signals were observed in activated blastocysts recovered from Foxa2^f/f uteri on day 4 of pregnancy. Scale bar: 25 μm. (c) Ki67 immunostaining on dormant blastocysts collected from day 8 Foxa2^f/fLtf^Cre+ and Foxa2^f/fPgr^Cre+ females. Scale bar: 25 μm. ICM, inner cell mass.