Myths and Beliefs about Identical Twins

You may have always been fascinate by identical twins. The idea of having a duplicate lies at the origin of many myths and beliefs. Twins are often represents as mysteries of nature, sometimes inseparable, and occasionally enemies.

Identical Twins are not Identical?

Identical twins are born from a single egg which divides only after fertilization is complete.

They call as monozygotic twins.

They may share the same DNA, look like the same person, and be able to swap places without being detect, but there are still little details which are invisible to the naked eye that make them unique.

Identical Appearance but Distinct Fingerprints

Twins do share the same genetic heritage but they do not have identical fingerprints.

The reason for this is very simple.

Genetic material is only partly responsible for our fingerprints.

Specific factors like thumb sucking or umbilical cord blood pressure also help determine what our fingerprints look like.

Fingerprints continue to change slightly into early childhood depending on the way children use their fingers.

Dogs can Identify Twins?

There’s way to distinguish identical twins like body odour.

External factors like food we eat and the places we visit, and only dogs have a keen enough sense of smell to differentiate them.

Twin Language

Twins often communicate with each other using a unique dialect that no one else can understand.

Most twins develop their own language code and expression. HA! HA!

No actully not they simply spend so much time together as children that they understand any strange sounds or words the other twin makes.

One twin can easily understand the other because they tend to make the same type of mistakes.

Womb Connection

Twins are known to have a uniquely complicit relationship that begins long before they are born.

According to study, twins begin to interact and socialize from 14 weeks’ gestation onwards.

Researchers came to these conclusions after observing fetuses interacting in the uterus.

You may think that in such a small space, twins touching and pushing each other to make room for themselves would naturally explain most of their movements.

Twins voluntarily seek out contact.

They cuddle and touch the other’s hands and eye area.

They sometimes push each other away.

If One Twin Develops Cancer then the other is also at risk of Developing Cancer?

Researchers from Harvard and Norwegian and Danish universities conducted a study on monozygotic and dizygotic twins with cancer.


They concluded that if one twin develops cancer then the risk of the other twin also developing the disease increases significantly.

The risk of developing a cancerous tumor increases to 37% for dizygotic (fraternal) twins and 46% for identical twins.

Cardiovascular and Brain Health

Monozygotic twins are genetically identical, both inside and out.

That’s why researchers often study identical twins to understand the role of nature vs. nurture in humans.

A US study at the genetic relationship between cardiovascular and cognitive health by comparing identical twins (one egg) and fraternal twins (two eggs). 

Results shows that heart and brain health is largely determine by factors related to family environment and socioeconomic status.

Twins are Rare

Being pregnant with twins is already quite rare but having identical twins is even rarer only 20% of twin pregnancies.

Researchers have noted a considerable increase in the number of twins worldwide over the last 40 years.

The number of twin pregnancies is on the rise in Western countries.

Some age-related factors may partly explain this phenomenon.

After a certain age women are more likely to become pregnant with twins.

According to some statistics the increase in fertility treatments is also behind the recent twin boom.

Twins can have Different Genders

Twins with Different Genders such twins are actually called sesquizygotic or semi-identical twins.

Australian woman’s ultrasound shows a single fertilized egg and a single placenta containing two fetuses just as you would see with a case of monozygotic twins.

After 16 weeks of pregnancy it was clear that there was one male and one female fetus.

Doctors currently support the hypothesis that the same egg was fertilise by two spermatozoa rather than one.

This phenomenon has only been observe twice in history.

Being Born a Twin comes with Risks

The mortality rate of newborn twins is higher than that of single births, primarily due to often difficult and premature childbirth.

After sharing a small space and the same amount of food during gestation twins tend to be born smaller in size and weight.

Mirror Twins

When the separation of the egg occurs later than usual then the identical fetuses develop diametrically opposed traits.

One twin will be right-handed and the other left-handed.

If one has a mole on the left side then the other has it on the right side.

These called mirror twins because when they stand face to face it’s like looking at a reflection in the mirror.


This myth is so famous that researchers at the University of Cambridge have taken a scientific interest in it.

Identical twins generally have the same educational, social, and family background.

Equip with the same points of reference and similar reflexes, they tend to make similar choices and follow the same path, even if they live apart.

Some stories verge on the paranormal, though, despite the numerous scientific and rational explanations for twin similarities.

Twins Children may be Both Siblings and Twins

This strange phenomenon only occurs when two pairs of monozygotic twins have children.

They probability that two identical twins will have children who are also identical twins is just one in a million.

Twins are Left-Handed?

It’s nearly twice as likely that both will be left-handed compare to the rest of the population.

Mirror twins are an exception to this.

Twins have the same Tastes and Eating Habits?

Researchers from King’s College London tested more than 2,000 twins on food preferences and habits and found that identical twins are more likely to share the same preferences as fraternal twins.

Researchers to conclude that food preferences have a genetic component.

It makes sense that twins with identical genetic backgrounds are more likely to develop the same tastes in food.


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