Why do girls have peridos?

Periods are a normal part of a woman's reproductive cycle. They occur when the lining of the uterus (the endometrium) is shed and expelled from the body through the vagina.

The menstrual cycle is controlled by hormones, primarily estrogen and progesterone. These hormones are produced by the ovaries and work together to thicken the endometrium in preparation for pregnancy. If pregnancy does not occur, the levels of estrogen and progesterone decline, causing the endometrium to shed and menstruation to begin.

Periods typically last for 3-7 days and occur every 21-35 days. The length and frequency of periods can vary from woman to woman and may change over time.

Some women experience discomfort or pain during their periods, such as cramps, headaches, fatigue, and mood swings. These symptoms can be managed with over-the-counter medications, such as ibuprofen or acetaminophen, or with hormonal birth control.