Hypophysectomy of birds V-Effect of replacement therapy on the gonads, accessory organs and secondary sexual characters of hypophysectomized fowls

In the course of making the necessary replacement therapy to carry the birds over the early post-hypophysectomy period, certain effects of anterior lobe extracts on the newly hypophysectomized fowl were observed. These observations were re-enforced by a long duration experiment with anterior lobe extracts, and by other experiments designed to show the effect of sex hormones and also of thyroxine on hypophysectomized fowls. The account given below concludes the description of our work on hypophysectomized fowls.