Is it possible to deliberately conceive twins naturally? The probability of having twins In what generation are twins born
In which case you may be concerned about the question: after how many generations are twins born, and who can have twins or twins? Let's say you have twins. Where? After all, no one remembers about the cases with twins in your relatives. Then the question of who can have twins will become relevant for you. And for your children, the question will be interesting: after how many generations twins are born, i.e. they have something like - maybe or not two babies can be born at once. What about your grandchildren, your children's children? Here we will tell you who can have twins using specific examples, and show how many generations twins are born.
We talked quite a lot about the probability of having twins, how it turns out and what needs to be done to make it born. We even wrote a separate article on how twins are inherited, on which line twins are transmitted or the story: how twins are inherited. In it, we described in detail who can have twins. Even in it, we promised to give specific examples. It's time to do it.
Here, by default, we believe that the possibility of giving birth to twins manifests itself immediately. Then who can have twins? Those who had her in the family. That is, if the appearance of twins is possible, then it will be. But this is ideal. It doesn't exist in life. In most specific cases, even those who have many relatives with multiple pregnancies in the family are less likely to give birth to twins than the birth of one child at a time.
It must be understood that twins are born only in about 1% of all births. Therefore, anyone who can have twins is very lucky. The maximum percentage on planet Earth is 10%, and then in the "capital of the twins" Candido Godoy, Brazil.
Who can have twins
Twins can be those who have twins or twins in the family. For nature, this is basically the same thing. In generations, only the super-or hyperovulation gene, which is responsible for the maturation of two or more eggs, can indulge. The gene manifests itself in the form of the birth of twins or twins.
How many generations are twins born when passed from woman to woman
The transfer of the gene from woman to woman occurs immediately and with a high probability of its manifestation, i.e. twin birth.
Who gives birth to twins and twins when transmitted from a woman to a man
A man's gene does not affect the ability of another woman to give birth to twins from him. And the man himself does not give birth, so the manifestation of his gene is possible only if he has a girl. Here she can give birth to twins, but with less possibility than her grandmother - her father's mother.
As mentioned above, the male gene does not help other women give birth to twin children from them. The gene will appear only if a woman possesses it. So to find out
after what generation twins are born when passing from man to man, it is necessary to count the number of generations from the last twin in the family to the first girl on the paternal side.
Who can have twins when passed from a man to a woman
Actually, twins can be born to this woman. After all, it is in her body that the gene can, in principle, manifest itself. In this case, after how many generations twins are born - after one generation, from the first twins on the father. In fact, an analogue of the case of the transfer of women-man-woman in the succession of generations.
How many generations are twins born
It seems that from a formal point of view, one should argue like this: twins are approximately equal to twins, then after how many generations twins are born:
- or immediately after one generation, if the transfer was to a girl
- or through a generation, if it was transmitted through a boy, and that girl was born
- or through two or more generations, when transmitted through a boy-boy
Then who can have twins? Those who had either them or twins. In general, everything is the same as in the case of twins.
However, there is one nuance that is very important for twins and twins.
Twins, they dizygotic fraternal twins, is indeed inherited due to the transmission of the superovulation gene. For their appearance, TWO separate eggs ready for fertilization. And twins, they are twins in the everyday sense, they are monozygotic identical twins are independent of this gene. This is because in this case ONE egg after fertilization at the stage of early division, it is split into TWO different parts, two future organisms.
Then who can have twins? - in any woman, the superovulation gene has nothing to do with it. Note that the mechanism of formation of monozygotic identical twins is known, and the reasons are not fully understood.
It turns out that after how many generations twins are born is unknown, because monozygotic twins cannot be inherited in any way. Their appearance remains so far an accidental phenomenon.
After how many generations twins are born - examples
To better understand how many generations twins are born and who can have twins, here are a few examples.
Through what generation are twins born if you are a woman and there was a grandmother with twins
So, the question is who can have twins if you are a woman. You have a grandmother who once had twins in her family, but no one remembers anything for sure. It is known for sure that your grandmother had twins (maybe even twins) - boys. In total, my grandmother had three children, the third was a girl.
If you are a descendant of twin boys, then the possibility of having twins is great. Your dad may have given you his superovulation gene from his mother, who is also your grandmother. Moreover, the pope himself never had, and never will have twins. Then who can have twins or twins is easy to answer - you.
If you are a descendant of a third child - a girl, then there will be two more options for you.
Who can have twins if your mom didn't have one.
You can still have twins, because. there is heredity. However, you have a small chance of having twins.
Who can have twins if your mom had them
It's still easier here, you can have twins with a high probability. And not necessarily you yourself are a twin sister. That is, you can be a single child, and you also have twin brothers or sisters. And if you are also a twin yourself, then the possibility of having twins is already very high for you. It is the largest compared to the other cases in this example.
Through what generation are twins born if you are a woman, and there was a grandfather with twins
And again, we ask the question
who can have twins if you are a woman. This time you have a grandfather who once had twins in his family, and again, no one remembers anything for sure. It is known for sure that my grandfather had twins. Your grandfather had three children in total. The third is not a twin. The gender of the third child is not particularly important for this example.
- If your mother is a twin, then your chances are the highest.
- Suppose that your mother is still not a twin, then the possibility of having twins is about 2 times lower for you. In any case, who can have twins - you, only with a different degree of possibility.
- Unless your dad is a twin. Then he could pass the gene on to you, and the probability of being born is also high for you.
- And if your dad was a twin, then you yourself have a higher chance of twins and is comparable to the case where your mom is a twin.
After how many generations are twins born - ATTENTION
To finally understand
after how many generations twins are born in this example, you need to pay attention to the following words. In this example, in ANY case, your grandfather with twins could not influence the birth of his own twins. And since there were still twins, then you need to look from the side of his wife - your grandmother. Then we return to the first example, everything is by analogy there.
Who can have twins or twins if you are a man
It's simple, twins or fraternal twins can only be born on your gene line to your female descendants. And the farther they are in generations from the fact of the birth of twins or twins, the less they themselves have the opportunity to give birth to twins.
It turns out that you are guaranteed not to have twins, even if your parents had one and you yourself are a twin-twin, you must be a boy by gender yourself. And it is better for you to have children of boys. If there are girls, see the examples above.
In practice, the mere desire to become parents of twins is not enough. Getting what you want is not easy. After all, according to statistics, twins are obtained only in one out of 80 cases pregnancy.
Nowadays, twins are born much more often. This happens mainly because that many women start taking contraceptives and other hormonal drugs early, or treat infertility by using medications that stimulate the ovaries and promote conception.
If your case belongs to this list, then you can console yourself with the hope that soon you will give birth to twins.
Who are the twins?
Twins- These are children of different ages. Such a pregnancy occurs when two eggs are fertilized by different sperm at the same time. Each fetus is formed in a separate placenta.
Twins can be both similar and completely different. The same goes for gender.
Scientists were able to establish that the predisposition to the birth of twins is transmitted genetically through the maternal line.
The probability of conceiving twins is 3 times higher than conceiving twins. It has also been observed that twins are more often born in older women.
At 20-30 years old expectant mother has 3% chance conceive twins naturally. BUT aged 30-40 years these chances increase to 6% .
With each subsequent pregnancy, the possibility of conceiving twins also increases, because the birth of a child is accompanied in most cases. And women with a slight excess of body weight are much more likely to become pregnant with twins.
In addition, according to studies, mothers who breastfeed and become pregnant during this period are more likely to conceive twins.
How can you conceive twins?
It is easiest for people from the Middle East and Africans to conceive twins. The geographic factor also plays an important role in the creation of twins.
For example, in the village of Kopan (Carpathians) for 50 years, 54 pairs of fraternal children were born. The villagers say that this is due to the healing water source that the village has. It is he who creates favorable conditions for the birth of twins.
Therefore, many people who want to become doubly happy parents go to this source. And some couples still managed to conceive twins after a trip to this magical place.
In the Rostov region, in the village of Denisovka, amazing phenomena were also recorded. There There are 19 pairs of twins for every 500 people.. This is affected by the fruitful land.
Locals say they know how to get pregnant with twins. In their opinion, even after staying in this village, a husband and wife will be able to conceive two children at the same time.
Artificial insemination and twins
Doctors also know about the secrets of conceiving fraternal children. The method, like nothing else, contributes to their birth.
Indeed, thanks to this method multiple eggs are fertilized at the same time, which are immediately transplanted to the woman. The likelihood that in this case two babies will be born is very high.
How to conceive twin girls?
When conceiving twin girls, the position in which you make love is of great importance. It is better to refuse in this case from deep penetration. The missionary position is more suitable.
Also have a special diet, which allows you to increase the chances of conceiving girls. Sugar, spices, fragrant herbs, jams should be included in the daily diet. At the same time, it is recommended to avoid foods containing caffeine and salty foods.
Another method built on the theory of youth of blood. It is generally accepted that this factor determines the sex of the child.
Because the the blood of a woman is renewed every three years, and men - every four, it is necessary to conduct a countdown that starts from the last large blood loss: surgery, abortion, childbirth.
Depending on whose blood is younger at the time of conception, you will be able to determine the sex of the unborn baby.
How to conceive twin boys?
- Guided desire to become parents of twin boys, you can use deep penetration positions, which are good because Y-sperms are more easily given a short distance to the uterus and they live less than their X-rivals. There is information that the favorable penetration of these spermatozoa is much more effective after a woman's orgasm, since substances are released that contribute to the vitality of Y-spermatozoa.
- Have sex before ovulation. It is necessary to guess the time of this process of the female body because of the short life span of Y-spermatozoa. This will increase their chances of getting to a mature egg faster than their counterparts.
- stick special diet, which provides for the exclusion from the diet of dairy drinks,
Some women, looking at a family with twins, say tenderly: “I would like that too!”. It is unlikely that they understand how difficult it is to raise and raise twins and twins. However, many are trying to understand how and why twins are born, what contributes to this, and how you can become a mother of several children at once.
They still cannot understand why a fertilized egg at the very beginning of its development simply divides into two absolutely identical organisms with a completely identical set of genes. This is how the development of twins begins. With twins, things are a little easier. In this case, in the female body, not one egg matures, as expected and intended by nature, but two. If both eggs are fertilized, the development of two children begins - twins. What is the difference between twins and twins, we have already told you before. Another question is why not one, but two eggs mature in the female body.
Scientists name a lot of reasons for this phenomenon. The main thing is heredity. The next in frequency of occurrence is the age of the woman and her nationality. These are the main factors affecting the likelihood of multiple pregnancy. However, the number of previous pregnancies, the use of hormonal drugs before pregnancy, nutrition, and the time of conception also affect the likelihood of twins. The state of the environment, and even the social status of the expectant mother, can also have an impact. It has been observed that twins are much more likely to be born to representatives of the lower social classes.
Separately, it is worth noting that with IVF, the probability of having twins increases significantly, since during artificial insemination, not one egg is planted in the uterus, but several at once. This increases a woman's chances of becoming a mother.
And now about everything in more detail.
So, the most important factor is heredity. If you have twins in your family, then the probability of multiple pregnancy is much higher. At the same time, male heredity can also contribute to the multiple pregnancy of a woman. Most often, such heredity manifests itself after a generation or two.
The age of the woman is also important. So, at the age of 18, there are few chances to become a mother of twins - only about 0.27%. By the age of 25, this figure increases to 0.62%, but this is still very small. By the age of 35, the chance becomes about 1.48%. When a woman turns 35, the likelihood of twins begins to gradually decrease. If by the age of 35 it grows to 1.48%, then by the age of 40 it is already 1.25%. That is, age, of course, affects, but not much.
Each subsequent birth increases the chance of having twins. After the second birth, the probability doubles, but if you give birth five times, then the probability of multiple pregnancy will increase by 5 times.
Affects the birth of twins and nationality, but it is not yet clear how. It has been proven that Nigerian women are 10 times more likely to have multiple pregnancies than Chinese women. In addition, it has been observed that black women have twins much more often than fair-skinned women.
Scientists are trying to connect the birth of twins with the nutrition of a woman, but this is still a very poorly studied area, almost nothing but conjectures and assumptions.
Even the time of year can affect the conception of twins. So, the longer the daylight hours, the more likely it is to conceive twins. For example, in Finland, most of these fertilizations occur in July - during the white nights.
Hormonal preparations have a great influence on the likelihood of having twins. It has been proven that women who have taken contraceptives for 6 months or more before pregnancy are much more likely to give birth to twins. So, if pregnancy occurs within 2 months after the abolition of hormonal contraceptives, the chances of having twins are doubled.
Gemini is a rarity in human nature. They are considered to be different from other people. In this article, we will try to dispel a number of myths about twins, as well as answer the question "why are twins born?"
Before answering this question, we will try to acquaint you with some basic concepts, and also mention in more detail some of the processes that take place in the body of a woman before and during fertilization.
Female germ cells - eggs - are formed in the ovaries, located on both sides of the uterus in the lower abdomen. Usually only one egg matures, which is ejected from the ovary most often at 28-day intervals. The egg enters the oviduct and there it can be fertilized by a male germ cell - a spermatozoon. After that, one human embryo begins to develop in the uterine cavity.
But in exceptional cases, it happens that in one month two or more eggs mature either in one or in both ovaries. All of these eggs can be fertilized and a woman can give birth to twins, and in very rare cases, give birth to three or four children. At the same time, each human embryo develops completely independently, in a separate fetal egg and with a separate children's place. Born arose, in fact, from two different eggs, which were fertilized by two different male germ cells. Such twins are not more similar to each other than other brothers and sisters, and may even be of different sexes. These twins are called fraternal twins.
Unlike fraternal twins, there are also identical twins that arise from a single fertilized egg. The fact is that in addition to normal human eggs, there are, as an exception, eggs with a large nucleus and a double or even multiple number of so-called chromosomes, i.e. particles that are carriers of human properties. Eggs of this kind are called multiple. In the same way, male germ cells may, in rare cases, have a double or even multiple number of chromosomes. Experts call such germ cells multiple.
If a multiple egg meets a multiple spermatozoon, a form may arise from which not one human embryo will develop, but two embryos - identical twins. This second type of twins is much less common than the first, and it can only be reliably established after childbirth. Identical twins are always of the same sex, i.e. either two boys or two girls. They are so strikingly similar that it is almost impossible to tell them apart. In addition to the physical similarity, the mental properties of identical twins are also extremely similar. That is why they are called "twins".
Pregnancy with twins is characterized in most cases by some deviations. Due to the fact that the internal content of the uterus is larger than usual, the pregnant belly is very large. A quarter of all twin pregnancies end before the expected due date.
While triplets, quads, quintuplets, and even more are born, these occurrences are so rare that they are reported on the Internet, TV, and radio, and sometimes become a worldwide event. In most cases, such and their parents enjoy the attention of trade and public organizations.
Statistics show that twins occur approximately once in 80 births, triplets - in 7100 births, and four children - in half a million births.
Usually the doctor detects with twins already during the examination in consultations, but this is possible only in the last months of pregnancy. In very rare cases, when children lie in the uterus one after another - one child in front and the other behind, it is impossible to detect twins during pregnancy.
What are the hopes of having twins? In general, small. Most often this happens in cases where a woman in labor, or her husband, or one of their ancestors were born as twins?
But do you know?
Myth #1: Twins are born in a generation.
Predisposition to have twins is genetically transmitted, really. But this "feature" may never appear.
In general, with twins, everything is not so simple. Babies that have appeared from more than one egg may well be born in different generations of the same family. And the chance of twins coming out of the same egg is still a mystery to science.
Myth #2: They are always born by caesarean section.
Not always. Some gynecologists perform caesarean sections with twins even less often than with one child. Of course, the likelihood of a caesarean increases with the number of twins expected. But you can give birth to two brothers or sisters on your own!
Myth #3: All twins are born premature.
The risk of preterm birth is high. But not all twins are born prematurely. The full gestational age at the birth of one child is 40 weeks.
But experienced obstetricians say that it is normal if the twins are born a little less - 37 weeks.
Myth #4: All twins have the same set of genes and chromosomes.
For those who came from one egg - yes. So-called dizygotic twins are no more genetically similar than normal siblings. Although twins, whatever they are, always have different fingerprints.
Myth #5: Geminis have different personalities.
No, everything is like ordinary brothers and sisters. Another thing is that they are constantly trying to compare. Therefore, everyone wants to prove their own separateness. Sometimes it comes to fights. If you remember that each of them is an independent person, the relationship can be balanced.
Myth number 6. The older twin is the first in everything. The younger one is the follower.
Minutes pass between the birth of twins, during which time nothing important can happen. And even more so such that would affect the development of personality.
Myth #7: All twins are "psychics." They feel each other from a distance.
There are no clear data on this. The twins spend a lot of time with each other. It is quite understandable that they can assume the thoughts of another at a certain moment.
Although the twins themselves convince others that this is not a myth, but the pure truth.
Myth #8: Twins are best separated at school. Or vice versa - to plant at one desk for all eternity.
For teachers and educators, separating twins may be better. But no permanent form of school placement is suitable for twins. They must sit together. But also apart. How? Yes, just change places every year, as all students do!
It is better for twin children to start learning in the same class. When twins are separated before they have learned independence, they will not be able to concentrate on their studies.
Myth No. 9. Due to their external similarity, they cannot be distinguished.
Some twins look alike, and some don't. But even identical twins with identical faces have subtle differences. A mole, a protruding ear, a manner of smiling... To see the difference, you just need to get to know them better.
Hello dear readers! I have a lot of questions in my head about having twins. And you? For example, twins are inherited through which line? What other conditions will add to the chances of a "double" pregnancy? What needs to be done to have twins? If you are interested in the mysteries of nature, then rather open my article.
The birth of twins at all times caused an ambiguous attitude among different peoples. The Incas, for example, worshiped women who gave birth to twins, considering the latter to be the sons of Lightning. In South America, the birth of twins was considered a sign of female infidelity or her connection with evil spirits.
In the north of the continent, the Indians treated the twins very gently and respectfully, considering them a gift from the gods. The mothers of twins in Japan were treated quite “coolly”: they were expelled from the tribe for fear of contracting multiple pregnancies.
"Virus" of multiple pregnancy
Of course, today it looks ridiculous. Modern science has studied well. They are simple and fit into a coherent scientific theory:
- The main factor is geographical: Africa is considered the ancestral home of the twins;
- Second place belongs to age: the peak of multiple pregnancy at 35 years;
- The number of births closes the top three: the probability of having twins increases with each new pregnancy;
- Nationality also matters: African twins are in the lead at the birth. - Women with black skin. Europeans follow. In other words, a 35-year-old Ethiopian multiparous mother is 10 times more likely to become pregnant with twins than a Chinese woman;
- Pyshechki are at risk for twins, in addition, the diet also matters. In Nigeria, for example, which is a leader in multiple pregnancies, yams are consumed. It is a vegetable that contains estrogen, the female sex hormone that controls pregnancy;
- The time of conception is also important: priority over summer and spring. The length of daylight stimulates the production of gonadotropic hormone. And it activates the ovaries;
- Refusal of hormonal contraceptives creates conditions for multiple pregnancy;
Interestingly, all this is true only for the birth of fraternal twins. Identical twins are not subject to any laws. The frequency of their birth is constant: 3 cases for every 1000 pregnant women.
Where do twins come from?
Multiple pregnancy is different. There are two options: single or fraternal twins. Monozygotic twins happen when a regular egg fertilized by one spermatozoon suddenly divides in half. What causes the oocyte to do this is unclear. What is the lineage of these twins? The answer is simple. The birth of identical twins is not inherited.
In all likelihood, this is still some kind of complex mutation of a fertilized egg, the trigger of which is a virus or some other provoking pathogenic factor.
The process is similar to cloning. Identical twins are identical in every way. And only they have the right to be called true twins.
Where do twins come from?
Polyzygous twins or twins are obtained when two different oocytes are fertilized by two different spermatozoa. Moreover, there may be more spermatozoa, the main thing is that several eggs mature during one ovulation. Then you get not twins, but triplets, quadruplets, and so on.
Fraternal twins are simply siblings born at the same time. Women who have the hyperovulation gene are usually capable of such pregnancy and childbirth.
Such an ability, or rather, this same gene, is inherited. The ability to have multiple pregnancies does not disappear from pregnancy to pregnancy.
If a woman has already given birth to twins, her chances of having twins in the next pregnancy are 4 times higher. For example, Madalena Granate from Italy had 15 triplets.
Dizygotic pregnancy allows different paternity. Unbelievable, but it is a fact! It's just that fertilization occurs on different days. So the husband and lover simultaneously become happy parents. There are many examples. An absolute proof of this possibility is the simultaneous birth of children with different skin colors. There is only one condition. In time - one conception from another should not lag behind by more than a week.
Why is this possible? Really, ovaries function in turn? Of course not, they work in cycles. But ovulation cycles can be several in a row with a difference of a week.
Probability of having twins
What is the actual probability of giving birth to twins in twin girls? There is no doubt that genetically it is they who receive the gene for multiple births from their mother. It has to do with the process of ovulation. Boys do not participate in it. However, if the boy himself is one of the twins, then his daughter in the future has a chance to give birth to twins. Hooray! I am the future grandmother of twin grandchildren.
And yet, it is not a fact that twin daughters themselves will give birth to twins. Most likely, they will be a "transit" for the transfer of the multiple pregnancy gene further down the female line. That is, the granddaughter of a grandmother who once gave birth to twins will most likely have twins. Giving birth to twins in a generation is an almost proven pattern. There are three hypotheses for this:
- The content of special substances in semen - enzymes that can split the oocyte into several fragments. This somewhat contradicts the theory of inheritance through the female line, but only in part. Recall that twin boys pass on the possibility of multiple births to their daughters.
- Mutations in the mother's cells due to abnormalities in RNA.
- During the formation of the gene set of the zygote, some identical genes are repulsed, which causes the cells to form a second individual. As a result, twins are born.
That's it! What is the lineage of twins in your family? Write, we look forward to comments.