Which pubertal development sign is commonly the first in girls?

Which pubertal development sign is commonly the first in girls?

• A. Growth of underarm hair
• B. Breast development (thelarche) around ages 8-13
• C. Menarche
• D. Voice deepening

Answer: (B)

Breast development begins the pubertal sequence in girls. It is driven by estrogen and starts with small breast buds, called thelarche, typically appearing around ages 8 to 13. This early change signals puberty and often occurs before other secondary sexual characteristics, such as pubic or underarm hair, and well before the first menstrual period. Menarche usually follows about two to three years after thelarche, once the reproductive system has matured. Growth of underarm hair and voice changes occur later, with deepening voices being more typical in boys. So, breast development is commonly the first pubertal sign in girls.

Breast development begins the pubertal sequence in girls. It is driven by estrogen and starts with small breast buds, called thelarche, typically appearing around ages 8 to 13. This early change signals puberty and often occurs before other secondary sexual characteristics, such as pubic or underarm hair, and well before the first menstrual period. Menarche usually follows about two to three years after thelarche, once the reproductive system has matured. Growth of underarm hair and voice changes occur later, with deepening voices being more typical in boys. So, breast development is commonly the first pubertal sign in girls.