From maternal and fetal evolution battle to bulk sanitary napkin menstruation humiliated who?

 From maternal and fetal evolution battle to bulk sanitary napkin menstruation humiliated who?

It is said that people are running high and history is moving forward. Sometimes, what is more difficult to surmount than menstrual poverty is the poverty of ideas.

Lets talk about it today.

Every woman, to a certain age, is to menstruate. Women have to endure more than a dozen big aunts torture a year, and they also have to spend a lot of resources on this.

Modern women in the fertile age stage, an average of 450 menstruation, more than 3000 days, about 8 years. According to a menstrual volume of 40 ml, to 450 times of menstruation calculation, a womans life just because of menstruation will bleed 18 L (similar to the volume of bottled water on the water dispenser), equivalent to more than 3 times of the whole body blood volume of an adult!

This is just the tip of the iceberg. Scientists have calculated that if you take into account everything a woman spends on her menstruation, a woman will spend about 20000 dollars on her big aunt (of course, Chinese women should spend less? After all, drinking more hot water can solve many problems.

Why should human female want to menstruate?

In fact, humans are not the only animals that will menstruate. In addition to humans, there are also some mammals will menstruate, so why do these animals menstruate?

Scientists have found that menstrual animals have some common reproductive characteristics, such as spontaneous ovulation, mating time is not limited to the ovulation period.

Most importantly, these menstrual animals have a haemochorionic placenta, the most aggressive of all placental types, and the trophoblast cells of the fetus are in direct contact with the maternal blood.

The appearance of blood chorionic placenta, on the one hand, allows the fetus to fully absorb the nutrition from the mother, on the other hand, it brings great trouble to the mother, even life-threatening.

In fact, in the process of fetal development, when the embryo is implanted into the endometrium, there is a contest between the mother and the fetus. Because half of the fetuss chromosomes come from the father and have different genes from the mother.

In order to continue the gene, both sides will do their best to ensure their survival.

The fetus hopes to absorb all possible energy from the mother, and invades the endometrium of the mother with the aid of the growing placenta, until it is connected to the spiral artery of the uterus, greedily absorbs nutrients from the maternal blood.

The fetus also produces hormones to dilate the arteries of the mother, paralyzing them and preventing them from contracting. In addition, the fetus also produces hormones that inhibit the mothers response to insulin and raise blood sugar levels. All this, of course, is for the growth of the fetus. Of course, these are all acts of active attack.

This is a brutal cell survival control war.

Every pregnancy is a risky investment for a mother to carry on her genes. Once the fetus is implanted in the endometrium, the mother loses some control over her hormones and is at risk of massive hemorrhage during childbirth.

Can mother be caught with her hands tied?

Of course not. In response to invasive blood chorionic placenta, menstrual animals have evolved spontaneous decidualization, which can be simply understood as a process of endometrial thickening. Under the stimulation of progesterone, the signal pathway is activated, decidual cells transform, and the endometrium thickens accordingly. The continuously thickened endometrium is actually a sharp tool for the mother to screen excellent embryos, reduce the cost and risk of pregnancy, and make full preparation for embryo implantation.

Of course, if not pregnant, then the endometrium will peel off, menstruation occurs.

This process happens unconsciously, and humans will abandon 30% - 60% of their embryos in this way. Only those strong embryos that have passed the rigorous test of the endometrium can complete a life journey of up to 10 months in the mothers womb.

In this way, it seems that the mother is not totally selfless in her treatment of the fetus. As a result of pregnancy, the mother will passively lose part of her body control. This is a risky investment. She cant bear to cover her child. She is also helpless.

However, on second thought, the fetus is also selfish in evolution. At least for human beings, the brain, which accounts for only 2% of the total weight of the human body, consumes 20% of the energy. This high energy consuming brain needs to greedily absorb the nutrition of the mother in the process of embryonic development. They plunder the mothers nutrients with the greatest ability, and even make maternal love flourish through hormone regulation Out.

So, dont talk about your childs selfish and ungrateful since childhood. From a micro perspective, when he / she invades your body, his / her nature will be revealed.

The ancients all said: children are enemies, to collect debts, it seems that this is no problem.

Big aunts black history.

Since ancient times, menstruation has always been linked with unknown. There are various reasons: Women bleed but never die, and this strange disease spreads to women but not to men. The ancients regarded this phenomenon as: the devil possessed

At that time, menstrual blood was associated with death, disease, foreboding, and curse. During the first aunts period, not to mention drinking hot water, drinking the northwest wind in the wilderness was already a very good treatment.

There are so many taboos about Auntie that you doubt your life.

1u3001 Primitive society

In primitive society, human beings have not yet fully evolved. They have no sense of shame like modern people when they come to menstruation. Therefore, they do not have any treatment measures. They only cover and wipe blood stains with hay or leaves. In addition, living conditions are extremely limited, lack of nutrition, their menstrual period is also relatively small, time is not long, so these simple measures are enough.

On the whole, its simple and crude.

Pliny, an ancient Roman scholar, wrote a book called natural history, in which he declared that girls aunts blood can make crops wither, steel rust, bees die, and inhibit plant seed germination. In short, there is no thing in the world that cant be done by Aunt blood, and those who get aunts blood will destroy the world.

2u3001 Slave society

In the slave society, women began to learn how to hide their shame with underwear made of animal skins or bark, put some dry things on them to absorb menstrual blood, and they also learned to wash the vulva with water to keep them clean.

In the middle ages of the west, it was believed that the child born after menstrual rooming would have red hair and look like a devil. Coincidentally, in China, people also think that children born in the same room during menstruation have red faces.

It is because of the demonization of menstrual blood that ancient women were forced to do so.

In order to reduce the amount of menstrual blood, it was popular in Europe in the Middle Ages to burn toads into ashes and eat them. A tribe in India will isolate girls who have entered puberty in a hut in the wilderness for three or four years, just like a sentence. Due to the poor sanitation conditions, the patronage of poisonous snakes and beasts, and the frequent occurrence of sexual assault, there are not a few women who died in the small black room.

3u3001 Feudal society

In ancient China, a girls menstruation was also known as horseback riding. If a girl happens to run into a special period of the brides wedding, it will be a matter of misfortune for the 18 generations. As the saying goes, riding a horse to worship a temple will ruin the family and cause death..

In ancient China, the imperial family had some marvelous feats, such as refining elixir with menstrual blood, using menstrual pants as a defense weapon, and giving their children menstrual blood to drive away evil spirits. The reason why there are so many wonderful things, in fact, is that menstrual blood can not properly handle such a problem.

4u3001 The Republic of China

During the period of the Republic of China, the young ladies and sisters gave us the feeling of being independent and independent. However, there were also various kinds of unbearable things behind them

Unfortunately, I was born as a woman. Every time I meet my menstrual period, I can get tired of dampness. The lining paper is thick and hard, and my muscles touch like thorns. The pain of spirit is unknown to outsiders.

Even in playing mahjong when touching a red, will curse: Damn, touched a menstrual band..

5u3001 New era

In the first World War, American female nurses made a bold attempt: spread medical cotton inside the sanitary belt, and fix it with bandages on both sides, so as not to touch the cotton, absorb a lot of blood and leak, which is the predecessor of sanitary napkin.

In 1921, Kimberlys company produced the worlds first disposable sanitary napkin, Kotex, now known as gauze.

In 1929, Dr. Haas from the United States invented the worlds first internal tampon. It was patented in 1933 and named danbis.

In 1970, there was a major breakthrough in the evolution of sanitary napkins, namely, the birth of self-adhesive adhesive sanitary napkins. After half a century, more and more brands of sanitary napkins, more and more exquisite technology, more and more safe materials, more convenient use, and more convenient to carry.

Women who are driven crazy by their big aunts prefer to have litter after litter in order to avoid dealing with big aunts. It is normal for every woman to have seven or eight children in a lifetime.

In ancient times, aunts only received about 50 times in their lives. The short life span is one of the reasons. At that time, the material shortage, girls growth retardation, menstruation came late and left early, and generally stopped menstruation in their 30s. During this period, because of early marriage, lack of contraceptive measures led to most of the time in the state of pregnancy, when no fertility, aunts torture will stop.

For women, the long years is a history of fighting with their great aunt. They dont love each other, but kill each other.

In fact, all the debates on the Internet can be less complicated.

Because under the issue of menstruation, what people expect from the beginning to the end is some clear and simple appeal: we expect that we can talk about menstruation in a big way, and no longer obscure it as a groups exclusive burden.

We hope that we can understand and empathize with each other more, and dont let some differences become the estrangement of long-standing and difficult dialogue.