“…The results of the present study demonstrate the presence of significant quantities of testosterone in the circulation of ovine freemartins, thereby confirming earlier reports from small numbers of animals (Saba et al, 1977;Braun et al, 1983;Bosu and Basrur, 1984;Kenny et al, 1992). These results, together with the presence of 3β-hydroxysteroid dehydrogenase within the interstitial-like tissue of the gonads , indicate that the gonad is the likely source of the steroid, whereas the much lower concentrations of testosterone in undifferentiated-type compared with maletype freemartins makes an extra-gonadal (for example, adrenal) source improbable.…”