Blood type can tell you a lot about a person. As a rule, it determines his character. The blood type remains unchanged throughout life, performing its main function, which is to support the vital functions of the human body.
Thus, a man and a woman must have perfect compatibility before planning a child. Blood type 4 positive is considered the rarest. It consists of AB antigens. Among the people it is also called mixed.
How did the fourth group appear?
It is believed that during the formation of human society, gene mutations occurred. This also applied to blood type. The fourth one arose last as a variant of the second and third. About a thousand years ago there was a mixing of the genetic groups of Indo-Europeans and Mongols.
It has been established that there are spots of this particular group on the Shroud of Turin. This makes it possible to classify Jesus Christ as a bearer of rare blood.
Children can get AB (IV) if the parents have the second or third group, and this type will never be formed if one of the parents has the first group.
The laws of inheritance are studied by medical genetics and used in judicial practice.
Inheritance of traits
For centuries, parents have only wondered what their child would be like. Today there is an opportunity to look into beauty far away. Thanks to ultrasound, you can find out the gender and some features of the anatomy and physiology of the baby.
Genetics allows us to determine the likely color of eyes and hair, and even whether a child has an ear for music. All these characteristics are inherited according to Mendelian laws and are divided into dominant and recessive. Brown eye color, hair with small curls and even the ability to curl the tongue are signs of dominance. Most likely, the child will inherit them.
Unfortunately, dominant signs also include a tendency to early baldness and graying, myopia and gaps between the front teeth.
Gray and blue eyes, straight hair, fair skin, and a mediocre ear for music are considered recessive. These signs are less likely to occur.
What kind of blood can be transfused?
Transfusion of fresh blood is prohibited by the Instructions of the Ministry of Health. Only red blood cells or other blood products are allowed to be used. But doctors know emergency situations in case of injuries, heavy bleeding, when a person’s life depends on the urgency of replenishing the bloodstream. In such cases, even direct transfusion from donor to recipient is justified.
In an emergency, the blood transfusion station prepares its supplies of blood substitutes and calls donors
Since it is very difficult to find a single donor for an AB (IV) Rh (-) case, transfusion of any Rh-negative blood is suitable. In this sense, people with the fourth group are considered “universal”. Because they already have agglutinogens A and B, additional administration from the second and third groups will not cause a reaction, and in the first group there are none at all.
A test for individual compatibility is mandatory, even with a planned transfusion.
What is the Rh factor?
Rh factor is the name for a number of erythrocyte antigen proteins that influence the occurrence of various immune reactions. This indicator is taken into account during transfusion (transfusion) activities so as not to jeopardize the life and health of the recipient (the person receiving the transfusion).
There are 50 types of rhesus-related antigen proteins, but six of them are of key importance. The central protein is D.
Briefly about protein D:
- It causes Rh conflict during pregnancy,
- Its absence or presence is defined as “negative” (Rh-) or “positive” (Rh+) group membership,
- Present in 85% of people on the planet.
When transfusing, Rhesus factors are always taken into account: if you transfuse positive blood to a person without the antigen protein, this will lead to serious consequences and may result in death.
Rh factor
Problems during pregnancy
For a pregnant woman with positive Rh and blood type IV, problems can only arise with bleeding during childbirth. Because there are difficulties with selecting donors.
During pregnancy, special conditions arise only if the mother does not have Rh in the blood and the father is Rh positive. In this case, the child can choose the man’s genes, and the mother’s body will begin to produce antibodies to the fetus.
If the child prefers the maternal genes, then this will not affect the pregnancy at all.
This reaction is called a “Rh conflict”. It is dangerous for both the mother and the unborn baby. The formation of organs and systems of the fetus is disrupted. There is a predisposition to interruption in the early stages.
During the first pregnancy, a sufficient level of antibodies accumulates only towards the end of the term, and the child’s body is minimally affected. The situation is especially dangerous during the second and subsequent pregnancies, which do not necessarily result in childbirth. Even after an abortion, antibodies have already appeared in the body of a Rh-negative woman. They begin to attack the unprotected fetus and cause complete rejection.
Boy or...
For many centuries, the blame for the lack of an heir in the family was placed on the woman. To achieve the goal of having a boy, women resorted to diets and calculated favorable days for conception. But let's look at the problem from a scientific point of view. Human sex cells (eggs and sperm) have half the set of chromosomes (that is, there are 23 of them). 22 of them are the same for men and women. Only the last pair is different. In women these are XX chromosomes, and in men they are XY.
So the probability of having a child of one sex or another depends entirely on the chromosome set of the sperm that managed to fertilize the egg. To put it simply, the father is entirely responsible for the gender of the child!
Prevention
To prevent such unexpected situations, obstetricians and gynecologists check whether the parents are matched by Rhesus. All adults are advised to know their blood type and Rh.
Antibodies are examined by immunological tests
During pregnancy, it is necessary to determine the onset of antibody production as early as possible. To do this, the woman is sent for a specific blood test.
Women with group AB (IV) Rh (-) are recommended to administer anti-Rhesus globulin in the first three days after abortion or childbirth. The technique has proven itself and allows you to have two or more children.
In the case of AB (IV) and positive Rh, the expectant mother does not have such problems, even if the father does not have Rh.
Table
According to the creators of this method, you can easily find out the sex of a child by blood by comparing the groups of parents in the following table.
Table for determining the sex of a child by blood type
How to calculate?
To determine the sex of your child based on the blood type of the parents, you need to find out the indicators of the parents and find them in the table. The sex of the fetus is located at the intersection of the rows and columns of the table. For example, if the wife has the third (B) group, and the husband has the first (0) group, then the couple will have a daughter. And if both have the third group (B), then you can expect a male child. This may seem like a fairly simple way to determine the sex of the unborn child based on the blood type of the parents, but how reliable is it? Read on.
By Rh factor
According to this method, primary sexual characteristics are also influenced by rhesus, which is also indicated in the table for determining the sex of a pregnant child by blood type.
Table for determining the sex of a child by Rh blood factor
According to this table, it is also easy to find out the gender of the child by blood type by comparing the indicators of the partners. For example, if two parents have the same Rh, then they will only have daughters.
In addition to Rh and the AB0 group, there is another rather interesting method for determining the sex of a child by the blood of the parents. According to it, people's blood is renewed cyclically: in men - every 4 years, in women - every 3 years. And the gender of the spouse, who was “renewed” earlier, is passed on to the baby. For example, if the father’s was “renewed” this year, and the mother’s was three years ago, then the fetus will have male genitalia.
But the test for the gender of the child by blood renewal has a serious drawback: how to find out when this happened last time? Theoretically, the update time can be calculated by date of birth. For example, at the 21st year of life, a woman should undergo the 7th renewal, and a man at the 32nd year of life should undergo the 8th renewal. But this does not mean that the process must begin exactly on your birthday. Although this method of updating the blood of parents to calculate the sex of the unborn child also takes into account transfusions and blood loss, there is no scientific basis for this method.
Can the blood of mom and dad determine the sex of the unborn baby?
So how can you determine the sex of a child based on the blood of the parents and is it even possible to do this? If we are talking about the biological material of the mother, then the primary sexual characteristics of the fetus can be found out, but not with the help of any tables or online calculators. And the male group does not in any way affect the formation of genitalia in the embryo, so any advice and recommendations on how to determine the sex of a child by the blood of the parents have no basis. Why?
Let us remember what the primary sexual characteristics of a person depend on. They are laid at the moment of fusion of the egg and sperm during fertilization. The egg has only an X chromosome, which determines the female sex. The paternal reproductive cell can carry both a female and a male chromosome. If at the moment of fertilization the sex cells of the parents are connected to the X chromosome and the Y chromosome, then there will be a boy. Otherwise there will be a daughter.
How does the antigenic characteristics of blood cells affect this process? Obviously, none. Based on the groups of antigens of the father and mother, it is possible to determine only a similar indicator in the baby, and then with a statistical probability of 25, 50 and 100% according to the summary table.
The type of antigen on the red blood cells in the mother does not in any way determine the sex of the embryo. Therefore, the method of finding out the sex of a child by the blood type of the parents is pseudoscientific and can only serve as entertainment.
Following the logic of this test, all married couples should have either sons or daughters. Then why do families have children of different sexes, including twins? This is a rhetorical question that contains the answer to how to determine the sex of the unborn child by blood type. There is no evidence in official genetics that blood cell antigens have any effect on the embryo.
Another method for calculating the sex of a pregnant child - the parental blood renewal test - is also not scientifically substantiated. There is no medical evidence that red blood cells and plasma are renewed every 3-4 years. Moreover, the life span of an erythrocyte is only 120 days, regardless of the person’s gender.
Features of people with a rare group
The Japanese especially believe in the characteristics of people with different blood groups. Many followers have appeared in Russia, so we will try to characterize a person of only group AB (IV).
How long can you think without being considered indecisive?
In contrast to the first group, the fourth makes a person soft and patient. He is respected for his knowledge, philosophical way of thinking, and ability to offer a unique way to solve a problem.
Such people are good in humanitarian professions and science. They are purposeful and friendly. The ability to empathize and sympathize leads them to medicine and acting.
Weaknesses include indecision, procrastination when it is necessary to act immediately, and the need for support and attention from others.
Dietary recommendations
For those who use D'Adamo's theory of the dependence of healthy nutrition on blood type, we will present product recommendations for creating your individual diet.
It is important to cook fish dishes
- The preferred meat products are lamb, rabbit, turkey, and liver.
- Tuna, sturgeon, and trout are considered especially useful. Limit crabs, crayfish, and shellfish.
- Egg no more than one per day, up to four per week.
- Low-fat fermented milk products (kefir, cottage cheese) are well absorbed. It is recommended to limit whole milk. Only hard varieties of cheese are shown.
- Fruits and vegetables are needed fresh, compotes. Bananas, oranges, bell peppers, pomegranates, and persimmons are not recommended.
- It is necessary to eat porridge made from rice, buckwheat, and oatmeal.
- Attention is drawn to the need for nuts and vegetable oils. Olive oil is recommended, but sunflower, sesame and flaxseed oils are not recommended.
- Drinks include fruit and vegetable juices, black and herbal teas, coffee is limited.
- Legumes, corn, and seeds are not recommended in the diet.
Attention is drawn to the tendency of people with the fourth group to be overweight. Therefore, the theory calls for monitoring blood sugar and preventing high cholesterol.
We note the absence of unusual combinations or beyond the requirements. The products are quite accessible to everyone who wants to eat in accordance with the theory. We must not forget about rational physical exercises.
We get our blood type from our parents. We are not able to change it. All that remains is to adapt and come to terms with the peculiarities.
