Mammary-derived growth inhibitor in bovine milk: Effect of milking frequency and somatotropin administration

Abstract
The effects of milking frequency and exogenous somatotropin on milk MDGI were investigated in cows. High levels of MDGI in milk were found during lactation; however, despite significant changes in milk yield, neither milking frequency nor somatotropin affected MDGI. The data do not support a role for MDGI in acute regulation of mammary synthetic ability. Key words: Milking frequency, somatotropin, MDGI, bovine, lactation, differentiation

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