Wieso bekommen Mädchen mit ca. 8-12 schon ihre Tage und können somit schwanger werden, wenn die Schwangeschaft gesundheitlich ein großes Risiko darstellt?

Was hat es biologisch für einen Sinn, wenn die grössere Elastizität des Bindegewebes und die effektivere Wehentätigkeit bei 8-17 Jährigen fehlt?

Wieso bekommen Weibchen eigentlich in der Natur ihre Tage in so jungen Jahren und können somit fruchtbar werden? Ist es ein Fehler der Natur oder nur ein Experiment?

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petrapetra64
2 years ago

Nature wants young people before being eaten by others or dying of an accident or infection. And young and healthy enough to take care of young people long enough.

Not too long ago you were dead as a person with an average of 30 to 40 years.

8 years, however, is rare, rather 11 – 13 for the first period average. And it’s gonna take a while to play it. This is so early, but also because of our good health care and nutrition. You get faster. It wasn’t like that before and the days came later than today.

Johannax32
2 years ago
Reply to  petrapetra64

Not too long ago you were dead as a person with an average of 30 to 40 years.

Do you understand what “average” means?

HarmonyZ
2 years ago

People used to be 30 years old. It was normal to get 14 children or was even called late. Biology naturally adapts, but not as fast as human living conditions became better.

I’d say something unprofessional. I am not a biologist

ToastmitHonig
2 years ago

There’s a couple of reasons for me.

Even if it sounds absurd to the outside and looks as if nature had damaged itself, there are some points behind it. Puberty begins at the age of 8 to about 13 years. From the point of view of evolution, one must mention that it was necessary to get pregnant early in order to maintain reproduction. And as strange as it sounds, nature took this risk to prevent human extinction. I couldn’t find anything for this, but in my view it makes sense (just likes me).

The second point would be that by the beginning of puberty, naturally different hormone levels are changed. Estrogen is necessary for typical puberty features such as breast growth. However, estrogen also has the important task of regulating the menstrual cycle. In concrete terms, this now means that the fertility, puberty and the hormone levels are closely related and thus there is the risk of pregnancy when it comes to the “reconstruction” of the entire body.

ToastmitHonig
2 years ago
Reply to  Azk21

I wish I could give you quite accurate figures. However, I can definitely confirm that the newborn mortality was definitely higher by a Viiieeel. Of course, women have often died at birth. Today you can treat a lot. Just to mention a few examples: pregnancy poisoning, pelvic end position, pregnancy diabetes, high blood pressure etc. – all at that time a death sentence. For mother and child.

In short, to give clarity. Around 1800, about 62% of newborns died! If you imagine this for the Stone Age, only the least survived. Historically there are also reports, for example in ancient Rome: “rich” citizens were recommended to bring at least 3 sons to the world to survive a heritage.

I think without this “reading” or natural selection, we would never have done so far as humanity is concerned. And there nature has made the reproduction quite clear about the life of the witnesses.

Here I found something exciting about infant mortality, and I also found the numbers: https://www.geschichtewiki.wien.gv.at/S%C3%A4uglingssterblichkeit#:~:text=Number%20allm%C3%A4hlich%20s%C3%A4 eyepiece,%2016%2C57%20%25%20ab.

ToastmitHonig
2 years ago

To the first point: Yes, but here is much more about the generality.

Point 2: We have developed so much (medicine, nutrition etc.) that we have adapted the world & nature a bit far to us. And these environmental influences affect when puberty begins.

ToastmitHonig
2 years ago

Why wouldn’t humanity have done it without this selection?

The strongest survives. The best features prevail. I have a nice example:

An island with birds. Some birds have a weak beak, the others have a strong one. seeds can be better cracked with the strong beak; So the stronger birds get more food. Meanwhile they multiply and the weak birds have no chance. Thus, the whole is constantly evolving and this constant adaptation holds us almost all alive.

or because they had it better than today?

I really like to doubt that. The development of medicine alone has improved so much that deadly diseases can be treated today with a few drugs. And even though you think we’re getting worse, the situation has improved considerably. At that time there were famines and one had to fight a loaf of bread – do you know what I want out? It has improved – the whole lifestyle, less danger.

For this reason, puberty has always slipped forward: the standard of living allows women to bring a child to the world today with 16 even though this would have been unthinkable a century ago.

And you have a really interesting point: why does the age go down, even though the danger is still there?
This is what I think we as a society “school” because our modern life goal is increasingly affecting nature.

studiogirl
2 years ago

Not all get their days/rules at the age. This can be very different.

The elderly were not older than 30 or 40, so early care had to be taken for young people.

In some population groups, the girls even get married with 12/13,,,, which is not understandable for us Europeans, but go to the jungle to a natural crowd, e.g. there are the girls very early.

SamaMoldo
2 years ago
Reply to  studiogirl

Especially “in the jungle with the natural populations” the girls get their period very late due to the living conditions, often only at 16 or 17…

Johannax32
2 years ago

How would you evaluate a “scientific evidence”?

noideaaa
2 years ago

Only a few were over 40 years old. Girls were also pregnant earlier.

Alexandra1410
2 years ago

A risk yes, but the meaning of beings is to multiply. As fast and as much as possible

Lunamarie541
2 years ago

I don’t know, but I think it used to be that girls have just gotten their days later but through eating with genetic engineering and so and I also believe through external factors such as stress we often postponed forward

anni08helloxx
2 years ago

So with 14-16 a girl has grown up. It’s easier to prevent pregnancy. People used to get 30, so they had to start early.

anni08helloxx
2 years ago
Reply to  anni08helloxx

And it comes from microplastics that is in our food. This affects the hormones.

SamaMoldo
2 years ago

The human being is from the house of Jäger&Sammler, which is hard work and scarce food. This leads to a menarch with about 16/17.

The good nutrition after development of agriculture and, of course, in modern times led to the fact that the period always comes earlier, which was not actually intended – but since this has no significant influence on health and mortality, there is no more reason to select this.

Johannax32
2 years ago
Reply to  Azk21

Of course, people were 30 or 80 at that time. The low average age of other time episodes is due to distorted statistics due to premature death (crisis, disease, famine, lack of hygiene, etc.).

Johannax32
2 years ago

Do you understand this statement?