At what point in female sexual maturation does menstruation generally begin?

Menstruation, or menarche, typically marks a significant milestone in female sexual maturation and generally occurs following the development of secondary sexual characteristics. While the timing can vary between individuals, it often begins after pubic hair growth, which is an indicator of the progression through puberty. The onset of pubic hair signifies the activation of ovarian function and the release of hormones necessary for menstruation.

Puberty is characterized by a series of physical changes, including the growth of breast tissue, the development of pubic and axillary hair, and the onset of menstruation. Research indicates that menstruation tends to happen after pubic hair reaches a certain stage of development, linking menarche to the broader reproductive maturation process.

Breast development usually occurs around the same time as these changes but may not directly precede menstruation as closely as the development of pubic hair does. Hence, the timing of menstruation aligning closely with pubic hair growth makes this option the correct choice.