menstruation

Menstruation, often called a "period," is a natural body process in which the lining of the uterus leaves the body through bleeding from the vagina. It is part of the reproductive cycle and usually happens about once a month, often starting around puberty and continuing until menopause. You can think of it as the body getting ready for a possible pregnancy each month; if pregnancy does not happen, the extra lining is shed and the cycle starts again.

You might hear someone say they are "on their period" or having "menstrual cramps." The cycle can affect mood, energy, and comfort. Understanding menstruation is important for reproductive health and general well-being. The word comes from Latin and is connected to the idea of something happening monthly.

Menstruation is a recurring body process in people with a uterus, marked by the shedding of the uterine lining, called the endometrium, along with bleeding from the vagina. It is a basic part of the reproductive system and usually begins during puberty, often between the ages of 10 and 16, and continues until menopause, which commonly happens in midlife. While many people learn that a menstrual cycle is 28 days long, real cycles vary a lot from person to person.

The process is driven by hormonal fluctuations, primarily involving estrogen and progesterone. These hormones build up the uterine lining each month in preparation for a potential pregnancy. If fertilization does not occur, hormone levels drop, triggering the shedding of the lining and resulting in menstrual flow, which typically lasts anywhere from two to eight days.

Historically, menstruation has been surrounded by stigma and taboo, often discussed in hushed tones or referred to with nicknames such as "Aunt Flo." However, there is a growing global effort to talk about periods more openly, improve menstrual hygiene, and address "period poverty," meaning a lack of access to sanitary products.

The term "menstruation" comes from the Latin mensis, meaning "month," which points to the cyclical nature of the process. It can also be called a "period," "monthly bleeding," or, in medical language, "menses." Understanding menstruation is not only about biology; it also means recognizing how it can affect physical comfort, emotions, daily life, and social experiences.