At which Tanner stage does a female first exhibit breast bud development?

• A. Stage 1
• B. Stage 2
• C. Stage 3
• D. Stage 4

Answer: (B)

Breast bud development is a key indicator of puberty onset in females and occurs in Tanner stage 2. During this stage, typically between ages 9 and 11, the first noticeable signs of breast development appear, characterized by the formation of small breast buds under the nipple. This is part of the broader process of sexual maturation.

In Tanner stage 1, there is no breast development; the breasts are flat. Tanner stage 3 involves further development where the breasts and areola enlarge, and in stage 4, the breasts become more contoured and the areola may project. Therefore, the significance of Tanner stage 2 as the stage where breast buds first appear is crucial for understanding female puberty and development.