Menarche refers to what significant event in the female reproductive life cycle?

Menarche is a crucial milestone in female reproductive health, marking the first occurrence of menstruation. This event signifies the onset of reproductive capability in females, typically happening between the ages of 9 and 16. It indicates that a girl's body has matured sufficiently to release eggs from the ovaries, which is a key aspect of the reproductive cycle. This event is significant not only biologically but also socio-culturally, as it often symbolizes the transition from childhood into adolescence and adulthood. Understanding menarche is essential for recognizing the broader context of female reproductive health and development.