Breast lobules - Normal atrophy with time

The normal breast lobules atrophy with the age of the woman.
(A) Normal breast lobule in premenopausal woman age 43 years. Note thickened basement membrane around ductules and early sclerotic changes of the lobule. (63x magnification).
(B) Normal breast in postmenopausal woman showing moderate atrophy of the lobules. (8x magnification).
(C) Normal breast in postmenopausal woman showing complete atrophy of the terminal ductal lobular unit. (1x magnification).
(D) Higher power magnification of normal breast in postmenopausal woman showing complete atrophy of the terminal ductal lobular unit. (4x magnification).