What is an aunt?

What is an aunt?

Menstruation is a noun in books that summarizes a physiological phenomenon of women, commonly known as period. It is a sign of a girl's physical maturity. In the past, most people didn’t know how to start the physiological education for children, but with the progress of society, physiology class is a compulsory course for children. Many children are familiar with menstruation, but sometimes they are still a little embarrassed to talk about menstruation in front of everyone, so the common name "aunt" came into being. So what is menstruation?

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 tens 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.

If the egg released at this time is fertilized, the fertilized egg is transported to the uterus through the fallopian tube for development, 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 will atrophy and stop secreting estrogen and progesterone about 14 days after ovulation. At this time, the blood vessels in the endometrium contract, the endometrium necrotizes and falls off, causing bleeding and forming menstruation.

Therefore, the length of the menstrual cycle depends on the length of the ovarian cycle, which is generally 21-30 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 3-7 days, and the total amount of bleeding each time is 30-50ml. Some people believe that menstrual volume exceeding 80ml is a pathological condition. While estrogen and progesterone levels decrease. The endometrium loses the support of these two hormones and begins to shed and bleed, which is when menstruation occurs. At this time, the decrease in estrogen and progesterone begins the next menstrual cycle.

<<:  My aunt hasn't been clean for more than ten days

>>:  How long after my period has passed can I have sex?

Recommend

How to choose cod? Storage of cod

The fish fat of cod contains globulin, albumin, p...

Inguinal hernia strikes: How to identify and remove a hernia?

Author: Jiang Fengru, attending physician at Beij...

40 days after the abortion, blood clots came out

Generally, after undergoing medical abortion, wom...

What is the cause of vaginal blood streaks at 59 days of pregnancy?

There will be no vaginal bleeding in a normal pre...

Women's physiological reactions to self-resolve

In modern society, it is actually very simple to ...

10 major "pollutions" that destroy your beautiful breasts

Core Tip: Many times we don't realize that th...

I always feel smelly before my period.

Before their period, many female friends will fee...

What to do if women have itching and pain below

Regardless of the age of the woman, if she experi...

What is the preparation for a pelvic exam?

The pelvis is a female reproductive organ, but be...

One month into pregnancy, I have morning sickness

After a successful pregnancy, various changes wil...

How to give birth quickly

During the third trimester, many mothers are part...

What causes women's thick thighs?

For many women, even if they are not fat, they ar...

Can breastfeeding mothers eat kelp?

Shredded kelp is a great food for home cooking. K...