Abstract
Conclusion
While the growth of the nipples of the hypophysectomized guinea pig may be stimulated with the estrogenic hormones, theelin and the benzoate of dihydrotheelin, neither the ducts nor the lobule-alveolar complex of the mammary gland responded even to long continued administration. It would thus appear that the inability of the estrogenic hormone to stimulate the growth of the mammary gland parenchyma in the absence of the hypophysis is probably not a species difference.
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