How long does a woman's period usually last?

Women's periods are cyclical, with a normal cycle of 28 to 35 days. The menstrual period lasts three to seven days. If it exceeds this time, as long as it forms a certain pattern, then menstruation is normal, so many women will remember their menstrual period and take preventive measures before menstruation comes. So how long does a woman's period usually last?

Some people, when their periods come, casually ask their best friends who they stick with every day, and find out that their periods have also come! Moreover, this is not a rare event that happens once in a thousand years, but a mysterious event that girls often encounter. This phenomenon is commonly known as menstruation being contagious, also known as "menstrual synchronization."

Why do people have periods?

Period, medically known as menstruation, is a term exclusive to women. Many times we wonder why girls have menstruation but boys don't?

Menstruation occurs when a woman's endometrium continues to thicken under the action of estrogen after she enters sexual maturity. Then, due to the decrease in estrogen secretion, the endometrium undergoes necrosis, shedding, and bleeding. The discharge of blood and the shed lining from the vagina is called menstruation.

Why do girls have menstruation but boys don’t? It’s because the reproductive organs of men and women are different, so naturally there are some differences.

Is menstruation really contagious?

In fact, the transmission of "period" is academically called "menstrual synchronization." Maybe classmates, colleagues, best friends, and even mothers and daughters, or sisters, have experienced menstrual transmission. There are different explanations for this phenomenon, and everyone wants to know the mysterious reason why menstruation is contagious.

Traditional Chinese medicine believes that the occurrence of menstruation is mainly related to changes in hormone levels in the body. Women's menstruation is related to the movement and magnetic field of the moon, and its cycle is 28 days. People who live together are often in the same lunar magnetic field, which over time causes their hormones to become similar, thus creating the "menstrual synchronization" phenomenon.

Western medicine believes that the so-called menstrual infection between women is due to the fact that they live and work together and may face the same stress, emotions, etc., plus they are in close contact with each other and will be affected by each other's hormones. Over time, their menstrual periods will tend to become consistent, which is a very normal phenomenon.

The female internal reproductive organs consist of the ovaries, uterus, and fallopian tubes. The main function of the ovaries is to produce eggs and synthesize ovarian hormones, while the uterus and fallopian tubes are reproductive organs. The ovaries contain hundreds of thousands of follicles, each of which contains one egg.

Before puberty, the follicles are essentially non-functional. During puberty, under the action of gonadotropin from the anterior pituitary gland, immature follicles gradually develop and synthesize estrogen. When the follicle matures and ovulates, the follicle wall collapses, the cells become larger and yellower, and are called the corpus luteum. It synthesizes estrogen and produces progesterone.

As the ovaries change, the endometrium is also affected and undergoes corresponding cyclical changes. Estrogen causes the endometrium to thicken, the endometrial cells to increase in number and size, and the arterioles in the interstitium to become more tortuous and spiral, which is called the proliferative endometrium. After ovulation, due to the combined effects of estrogen and progesterone, the endometrium becomes edematous, the glands produce a large amount of mucus and glycogen, and the thickness of the endometrium increases from 1 mm to 6 mm, which is called the secretory endometrium.

Therefore, the length of the menstrual cycle depends on the length of the ovarian cycle, which is generally 28-30 days, but varies from person to person and may be 23-45 days, or even 3 months or half a year as a cycle. As long as it is regular, it is generally considered normal menstruation.

The bleeding time is generally 2-7 days, and the total amount of bleeding each time is 30-50ml. Some people believe that menstrual volume exceeding 80ml is a pathological condition.