2001 Volume 63 Issue 2 Pages 167-170
Serum concentrations of growth hormone (GH) and insulin-like growth factor-1 (IGF-1) were determined in 5 calves in the same lineage with growth retardation. They had normal appetites, activities, body proportion, and laboratory test results. Calves with growth retardation had higher serum GH concentrations and lower serum IGF-1 concentrations. These findings suggested defects in the GH-IGF-1 axis, such as in the GH-receptor.