first , how do estrogens and progesterone act on the mammary epithelium , second , what is the sequence in which they act on the mammary gland in order to induce differentiation of the organ , third , why the same homonal milieu in a single animal results in asynchronous development of glands located in thoracic versus those in the abdominal region .
C0596882
mammary epithelium
C0929301
mammary gland