Sex differences in plasma concentrations of steroids during the sensitive period for brain differentiation in the zebra finch.

Abstract

Changes in plasma concentrations of sex steroids were examined in male and female zebra finch chicks during the sensitive period for differentiation of sexually dimorphic brain nuclei associated with the control of song. Using a chromatographic separation procedure and radioimmunoassay, androstenedione, testosterone and 5 alpha-dihydrotestosterone were… (More)

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