What is the normal sequence of sexual development in girls?

The normal sequence of sexual development in girls typically begins with thelarche, which is the onset of breast development. Following this, pubarche occurs, marked by the appearance of pubic hair. After these initial changes, there is a growth spurt, which represents a significant increase in height and weight that occurs during puberty. Finally, menarche, the onset of menstruation, occurs as a culmination of these developmental processes.

This sequence is a reflection of the hormonal changes that occur during puberty, primarily driven by the increase in estrogen levels. Estrogen not only stimulates breast development and the growth of pubic hair but also plays a vital role in overall growth and the initiation of menstrual cycles.

Thus, the order of thelarche, followed by pubarche, then a growth spurt, and culminating in menarche accurately represents the typical developmental pathway in girls transitioning through puberty.