6PROSSER C G, DAVIS S R. Milking Frequency Alters the Milk Yield and Mammary Blood Flow Response to lntra-mammary Infusion of lnsuhn-like Growth Factor in Goat[J].J Endocrinol, 1992,145:311-320.
7VICKI R S, KERSTIN H. Insulin-like Growth Factors and Their Binding Proteins[J]. Physiological Reviews, 1990, 70:591-614.
8WHEELEK E E, CHALLACOMBED N. The Tropic Action of Growth Hormone, Insulin-like Growth Factor-1 and Insulin on Human Duodenal Mucosa Cultures in Vitro [J]. Gut, 1997,40(1): 57-60.
9WANG T, XU R J. Effects of Colostrums Feeding on Intestinal Development in Newborn Pigs[J]. Biol Neonate, 1996,70: 339-348.
10FENTON S E, SHEFFIELD L G. Lactogenic Hormones Increase Epidermal Growth Factor Messager RNA Content of Mouse Mammary Glands[J]. Biochem-Biophys-Res-Commun, 1991, 181: 1063-1070.
