menarké

Menarké is the term used to describe the onset of menstruation in a female. It is a significant biological event marking the beginning of a woman's reproductive years. This process is a natural part of puberty and is triggered by hormonal changes in the body.

The menstrual cycle is a monthly process that prepares the body for potential pregnancy. It involves the thickening of the uterine lining, followed by ovulation, the release of an egg from the ovary. If fertilization does not occur, the uterine lining is shed, resulting in menstruation, or a period. The first menstrual period is called menarche.

The age at which menarche occurs can vary widely, typically between the ages of 9 and 16, with an average age of around 12 or 13. Factors influencing the timing include genetics, nutrition, body weight, and overall health. Early or late menarche can sometimes be an indicator of underlying health conditions, and consulting a healthcare professional is advised if there are concerns.

The occurrence of menarche signifies that a girl's body has reached a stage of sexual maturity. It is accompanied by other physical changes associated with puberty, such as breast development and the growth of pubic and underarm hair. The cycle that follows menarche is often irregular at first and may take some time to establish a predictable pattern. Understanding menarche is important for sexual and reproductive health education.