Tanners stages refer to a clasification of pubertal development. Breast and pubic hair/genital development is measured this way. In reference to the breast : Tanner 1: Prepubertal, no breast tissue Tanner 2: Appearance of breast bud Tanner 3: Enlargement of breast and areola Tanner 4: Nipple and areola for a mound atop underlying beast tissue Tanner 5: adult configuration with areola and breast having smooth contour -Rob Rob Cordes, DO, FAAP, FACOP Wilkes Barre PA mail to:[log in to unmask]