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Effect of the dry matter intake level on the sanguine profile of glucose, insulin, urea, estrogen and progesterone and concentration of IGF-I in the follicular liquid of crossbred heifers

2009; Instituto de Tecnologia do Paraná (Tecpar); Volume: 52; Issue: 1 Linguagem: Inglês

10.1590/s1516-89132009000100008

1678-4324

Luiz Paulo Rigolon, Ivanor Nunes do Prado, Fábio Luiz Bim Cavalieri, Willian Gonçalves do Nascimento, Luiz Carlos Copovila, Fabíola dos Santos Ramos, Fernanda Barros Moreira,

Growth Hormone and Insulin-like Growth Factors

The aim of this work was to study effect of the dry matter intake level on the concentrations of glucose, insulin, urea, estrogen and progesterone in the blood and the level of IGF-I in the follicular liquid of heifers. Twenty seven crossbred heifers were used, in three treatments: 1.2, 1.6 and 2.6% of the live weight of dry matter intake (DMI) daily. The sanguine concentrations of glucose and estrogen were higher in the animals with 1.6% of DMI and the insulin levels were higher in the animals with 2.6% of DMI. There was an increase in the sanguine levels of urea with the increase of the DMI. There was no effect of the DMI on the progesterone levels in the sanguine plasma collected from the jugular. The progesterone levels in caudal vena were higher in the animals with 2.6% of DMI. There was no effect of the DMI on the follicular levels of IGF-I.