4 Types of Twins

  • By: Maya
  • Date: March 31, 2022
  • Time to read: 2 min.

Twin births are on the rise in the United States. According to a report by the Centers for Disease Control and Prevention, the number of twin births has increased by more than 43% since 1990. The main reasons for this increase are unknown, but may be related to improved healthcare and fertility treatments. Twin births are often considered successful, but there are some risks associated with them, including high rates of early delivery and low birthweight babies. Let’s dive into the different types of twins.

Identical (Monozygotic) Twins:

These twins share the same DNA and look exactly alike. Identical (Monozygotic) twins are rare – only about 1 in every 150 pregnancies results in them. This means that for every 100 pregnancies, there is only one pair of identical twins. These twins share 50% of their DNA. For example, if one twin is a brother and the other is a sister, they would have shared half of their DNA.

Fraternal (Dizygotic) Twins:

These twins are born from two different eggs and look different from each other. Fraternal (Dizygotic) twins are more common than identical twins. About 25% of all twin births are fraternal. This means that for every 100 pregnancies, there is at least one pair of fraternal twins. These twins share 50 inger of their DNA.

Mirror Twins:

At first glance, mirror twins seem to be exact copies of one another. But upon closer inspection, they often have differentiating features that set them apart from one another. Mirror twins often share a personality trait or two, but they also have their own individual quirks that make them unique individuals. Mirror twins are fascinating creatures and offer a unique perspective on human behavior.

Conjoined Twins:

There is no one answer to the question of what it’s like to be conjoined twins. Each twin’s experience is unique and filled with its own set of challenges. Some people may find the close proximity comforting, while others may feel trapped and suffocated. Regardless, these two people are forever linked and share one body. There’s no escaping your twin or their emotions – they’re always there, waiting to surround you and pull you under. 

Conjoined twins are born when an embryo splits in two prematurely, leaving the organs attached but not fused together. This can happen for a variety of reasons including genetic abnormalities or traumatic birth injuries. The twins usually share a single heart, liver, intestines, bladder and sometimes even a liver and kidney. They also have similar blood types and share most of their bones – making surgery difficult if not impossible.


In conclusion, there are four types of twins: monozygotic, dizygotic, conjoined, and mirror. Monozygotic twins develop from a single fertilized egg that splits in two, while dizygotic twins develop from two different eggs. Conjoined twins share a single body, while mirror twins are identical but their personalities are opposite. Each type of twin has its own unique set of characteristics.

Leave a Reply

Your email address will not be published.

Special Twins

Previous Post

Why Are Twins So Special?

Next Post

Good Twin Vs. Bad Twin

teaching baby lesson