In which Tanner stage is a 14-year-old female with breast and areola as one mound?

A 14-year-old female classified in Tanner Stage II has breast development characterized by the breast and areola forming one mound. This stage marks the onset of breast budding, where the nipple and areola begin to protrude, but they still appear as a single mound without distinction between the two.

Tanner Stages are a way to assess physical development during puberty, particularly in females, regarding breast development, pubic hair growth, and other secondary sexual characteristics. At Tanner Stage I, there is no breast development, indicating prepubescent status. In Tanner Stage III, the breast tissue further develops, and the nipple becomes more pronounced and distinct from the areola. In Tanner Stage IV, the breasts are fully developed with a secondary mound of areola and nipple prominent above the contour of the breast.

Thus, the description provided aligns perfectly with Tanner Stage II, as the transition from no development (Stage I) to the distinct changes seen in later stages (III and IV) supports this classification.