Growth hormone secretory pattern and somatomedin C plasma concentrations in newborn calves.

Plasma growth hormone (GH) and somatomedin-C (IGF-1) concentrations were measured by radioimmunoassay in 16 dairy calves during the first 20 days of postnatal life. The lowest plasma GH concentration (0.07 +/- 0.01 nmols . l-1) occurred 4 h after birth. It increased gradually until the 3rd day, to reach values similar to those measured in adult males (0.15… CONTINUE READING