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Collagen deposition. The ratio of collagen fibres is shown in box graphs. Azan staining for collagen fibres on day 11. Bar, 200 µm. Values are expressed as mean ± SD, n = 4–5, for each group, ANOVA, Tukey–Kramer *P < 0·05, **P < 0·01: OVX + 17β‐estradiol versus OVX.
