We studied the developmental pattern of serum IGF-1 concentrations in the rhesus monkey in cross-sectional and longitudinal manners. Values were lower in infants with a significant rise at the onset of puberty. Females values were lower than males except for pregnant females. There was a correlation of IGF-1 values with body weight in the males. Longitudinal study of six animals proved this age dependence of IGF-1 values. The rhesus monkey has a pattern of serum IGF-1 concentrations similar to that of the human being.
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Dennis M. Styne (1991) studied this question.
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