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E8 placenta. Immunostained for SPL protein, counterstained with hematoxylin. A. Decidua (D) with moderate to strong cytoplasmic signal and weaker signal in labyrinth (L). Scale bar 3 mm. B. Decidual cells with minimal to mild cytoplasmic signal. Scale bar 200 um. C. Giant cell trophoblasts (arrow) with absent to minimal signal. ec – endothelial cell, rbc – red blood cells. Scale bar 200 um. D. Labyrinth spongiotrophoblasts with minimal to mild signal. Scale bar 200 um.
