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IGF2mRNA expression relative toβ-ACTINmRNA expression in the mammary gland.IGF2 mRNA expression (mean ± standard error of the mean) compared with β-ACTIN expression in the mammary gland across the four phases of lactation. IGF2 was highest in the perinatal period, but steadily decreased throughout the remainder of lactation. a significantly higher than b(P < 0.05). IGF, insulin-like growth factor.
