In Tanner stage III, how does the breast structure change for females?

In Tanner stage III of breast development, a significant change occurs in the breast structure of females, where the breast begins to elevate beyond the areola. This indicates a transition towards a more developed breast shape and size. At this stage, the breasts move from being simply flat or slightly elevated to forming a noticeable elevation, which is a key marker in the progression of breast development.

The correct answer reflects the physical changes characteristic of this stage, showing that the breast tissue is beginning to mature and develop more fully. This change is significant as it signals the body’s advancement towards physical maturity.

The other options describe breast developmental characteristics seen in either earlier or later stages. For instance, developing an adult-like contour typically refers to Tanner stage IV or V, while a secondary mound formation is indicative of stage V—where the breast has fully developed. The statement regarding the areola containing no glandular tissue is not accurate for Tanner stage III, as this is a characteristic more aligned with earlier stages of breast development. Therefore, option B accurately captures the essential change that occurs specifically during Tanner stage III.