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Cancer markers in the mammary gland: a–b Immunostaining detection of tumor molecular markers (ERα, PR); the positive cell rates not significantly different between the two groups (P > 0.05). Scale bar: 20 μm. c The expression of four mammary gland tumor molecular markers was analyzed by real-time PCR: their expression was not significantly different between the superovulation and normal groups (P > 0.05). S = superovulation group; N = normal group
