Menarche is the term used to describe the first occurrence of menstruation in a person's life, typically marking the onset of puberty in females. It is the first menstrual period and is considered a significant milestone in a young person's development.
Menarche usually occurs between the ages of 9 and 16, with the average age being around 12 years old. However, the timing can vary widely from person to person due to factors such as genetics, nutritional status, overall health, and environmental factors. The onset of menarche is influenced by the body's hormonal changes, particularly the increase in the production of estrogen.
After menarche, females continue to experience menstrual cycles, during which the lining of the uterus is shed if fertilization and pregnancy do not occur. Menstrual cycles typically occur every 21 to 35 days and last about 2 to 7 days, though there can be considerable variation.
Menarche is a significant event in a person's life as it signifies their transition from childhood to adolescence and the potential for reproduction. It often comes with physical and emotional changes and requires education and support to navigate this new phase of life.