Why do girls menstruate? What are some tips for women to take care of themselves during menstruation?

　　Menstruation is a very normal thing, but everyone female Everyone must understand what menstruation is, and only by understanding it can we control it. Only when we understand what menstruation is about can we judge our physical condition. So why do girls menstruate? How do women take care of themselves during menstruation? Next, I will introduce them one by one for your reference.

　　Why do girls menstruate?

　　A woman will produce one egg a month. When there is no sperm When combined with an egg, a woman’s Uterus The endometrium will fall off, and bleeding will occur at this time. We call it menstruation. A more specific introduction is as follows:

　　First, we must understand the structure and physiological functions of female reproductive organs in order to explain this problem. 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. The uterus and fallopian tubes are reproductive organs. The ovaries contain hundreds of thousands of follicles, each of which contains one egg.

　　Follicles are essentially nonfunctional before puberty. During puberty, under the action of gonadotropins from the anterior pituitary gland, immature follicles gradually develop and simultaneously synthesize estrogen. When the follicle matures and ovulates, the follicle wall collapses and the cells become larger and yellower, called the corpus luteum, which synthesizes estrogen and also produces progesterone.

　　As the ovaries change, the endometrium is affected by them and undergoes corresponding cyclic changes. Estrogen makes the endometrium thicken, endometrial cells increase and enlarge, and the small arteries in the interstitium become more tortuous and spiral-shaped, which is called proliferative endometrium. After ovulation, due to the combined action 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 phase endometrium.

　　If the egg discharged at this time is fertilized, the fertilized egg will be transported to the uterus through the fallopian tube to develop, which is called pregnancy. The pregnancy tissue synthesizes a chorionic gonadotropin, which supports the continued development of the corpus luteum of the ovary.； If the egg is not fertilized, the corpus luteum atrophies and stops secreting estrogen and progesterone about 14 days after ovulation. At this time, the blood vessels in the endometrium contract and the endometrium becomes necrotic and falls off, causing bleeding and menstruation.

　　Therefore, the length of the menstrual cycle depends on the length of the ovarian cycle, which is generally 21 to 30 days, but varies from person to person, and can range from 23 to 45 days, or even 3 months or half a year. As long as it is regular, it is generally considered normal menstruation. The bleeding time is generally 3 to 7 days, and the total amount of menstrual bleeding is 30 to 50ml. Some people think that more than 80ml of menstrual bleeding is a pathological condition.

　　How do women take care of themselves during menstruation?

　　1. Keep warm

　　During menstrual period, you should pay attention to keep warm, that is, avoid blowing cold air.