12 curiosities about twins
The birth rate of twins has increased by 76% since 1980 and so far, due to the increasing age at which women choose to become mothers and in vitro fertilization treatments. The twins share the same DNA, but they have different fingerprints, they develop similarly, even if they are separated at birth and become different or not at all, although they are exposed to the same pathogenic factors.
Twins are more likely to be left-handed
Statistics have shown that 22% of twins prefer to use their left hand for writing and other usual activities, compared to those from single tasks, who are left at only 10%.
The twins share the same DNA, but they do not have the same fingerprints
Exposure to different parts of the uterus, during pregnancy, causes different ridges and spirals to form on the navels of the twins' fingers, which means that they have different fingerprints.
Twins can have different fathers
This is the phenomenon of "heteropaternal overgrowth", which occurs when a woman has unprotected sex with two men, during the same ovulation. Thus, there is the possibility that 2 sperm from different men will fertilize the egg and cause the twin pregnancy to occur. The phenomenon is common in animals and occurs very rarely in humans.
Twins may not actually be twins
Fetuses that share the same uterus in a pregnancy are not required to be twins and have the same date of birth. There is a very rare medical condition, called superficiality, which occurs when a pregnant woman continues to have menstruation and, following an unprotected sexual intercourse during pregnancy, becomes pregnant again.
In this case, the pregnancy passes through two births in the same pregnancy: the first, when the term of pregnancy of the first conceived child ends, and the second, later, when the second conceived child reaches the term. The two brothers are not considered twins, even though they shared, for a period, the same womb.
Twins have their own unique language
The twins even speak their language. Babies often gang up on each other, but when it comes to twins, their sounds and whistles are part of a unique language, just theirs, called cryptophasia or idioglassia, through which they communicate and understand each other.
The interaction between them starts from the mother's womb
The twins begin to interact in the womb in the 14th week of pregnancy, and from the 18th week they start to play and touch each other more often than they touch themselves, according to a 2011 study. Italian researchers from the University of Padua.
Identical twins are not really ... identical
At first glance, it is difficult to differentiate identical twins, but upon closer analysis, you will find that they are not 100% identical. In addition, a study published in the Proceedings of the National Academy of Sciences highlighted that many pairs of twins, even if identical, tend to form different physical traits as they grow older.
These are the epigenetic effects, by which the differences of physical nature begin to develop during childhood, being influenced by the eating habits of each brother, by the exposure to chemical factors, etc.
The twins get sick differently
Twins can share many things and have many things in common, but not the diseases they develop, not even those caused by factors they have been exposed to simultaneously. Therefore, children born from twin pregnancies do not always share their diseases, not even the contagious ones.
British researchers have found this important difference following a 1983 case, when a pair of twins were mistakenly infected with the HIV virus and only one developed the disease. His brother never got sick, and doctors never found traces of the virus in his blood, although he was tested periodically.
Separate twins at birth develop similarly
Even though twins are separated at birth and growing up in different countries, environments and cultures, they develop similar traits in terms of health, personality, intelligence, talents, ie in aspects that are influenced by genetic inheritance.
So, if a pair of twins is reunited for a long time, it is quite possible that the two brothers will find that they have common interests and passions, that they have a similar IQ and that they suffer from the same affections (especially those who are inherited legally). .
Twins can have different breeds
If twins are the product of the conception of parents of different races, there is a possibility that the two children may also have different races. The chance that this phenomenon will take place is very small, almost 1 to 1 million.
The relationship between twins and parents becomes more difficult
Twins tend to have a colder and more distant relationship with their parents. Although the emotional bond exists and is intrinsic during pregnancy, the way parents often react to the responsibilities of caring for two children simultaneously leads to some detachment and involvement in their development.
In addition, studies have shown that the favoritism of one of the children among families with twins is higher than in other families and that, although it is an instinctive inclination towards preferential treatment, it can lead to neglect of the other brother and the difficulty of forming a relationship. with him.
The twins share the same DNA, but it is not identical
Even if the twins are made from the same egg and the same sperm, it is not mandatory that the genetic material they come from is identical. Specialists claim that some twins have small differences in their DNA, but they have not been able to discover the exact causes for which they occur, although many account for their exposure to various environmental factors.
Do you know any other curiosities or interesting things about twins? Are you a parent of twins? What common characteristics have you observed in your children? Tell us your opinions and suggestions in the comments section below!
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