What term refers to the first incidence of menstruation in a female, marking the onset of puberty?

Menarche is the term that specifically refers to the first occurrence of menstruation in females, signaling the onset of puberty. This biological milestone typically happens between the ages of 9 and 16, indicating that the body has developed to the point where it can begin the menstrual cycle. It represents not just a physical change, but also a significant psychological and social development in a young person's life.

In contrast, menopause refers to the end of menstruation and reproductive capability later in life, and menstruation itself describes the cyclical shedding of the uterine lining that occurs regularly during a female’s reproductive years. Maturation refers to the overall process of aging and development, which encompasses not only physical changes but also emotional and cognitive growth. While these terms relate to female reproductive health, menarche specifically pinpoints the moment when menstruation first begins.