Abstract
A postnatal left ovariectomy induces a masculinization of the fowl right gonad. These sex-reversed females acquire secondary sexual characters of male type. The hormonal pattern (progesterone, dehydroepiandrosterone, androst-4-ene-dione, dihydrotestosterone, estrone, and estradiol) has been investigated by radioimmunoassay of extracts of the right gonad of ovariectomized fowls between 9 days and 5 months of age, and in normal testes and ovaries of the same age. It was shown that the right gonad which had androgenic potencies at 9 days produces more estrogens at 2 months when it is not yet sex reversed. However, at 5 months this testis-like gonad appears to produce twice as much testosterone as do the two normal testes.
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