Tanner staging of breast development in females

Stage 1: Prepubertal.

Stage 2: Breast bud stage with elevation of breast and papilla; enlargement of areola.

Stage 3: Further enlargement of breast and areola; no separation of their contour.

Stage 4: Areola and papilla form a secondary mound above level of breast.

Stage 5: Mature stage with projection of papilla only, related to recession of areola.