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Immunohistochemical staining of Ki67 proteins on ovaries. A) Ki67 staining in cystic follicles from neonatal genistein-treated ovaries (a, a1–a2) and large follicles from control ovaries (b). B) Ki67 staining in ovarian medullary cells (a1: genistein group; b1: control group) and vascular epithelial cells (a2: genistein group; b2: control group).
