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EGF seemed to stopped the process of luteolysis and “reluteinized” the CL. Ovaries from control rats on d13 of pregnancy, sham rats on d21 and 22, and EGF-treated rats were obtained. Sections were stained with hematoxylin–eosin. Representative photographs of each group are shown. (Original magnification, ×500.) FC, foamy cytoplasm; HN, homogeneous nucleus; EN, evident nucleolus; FI, fibroblasts.
