Mirror twins are a special type of identical twins. Imagine looking into a mirror.

All twins start from an egg, but mirror twins come from a single egg that splits a bit later than usual after fertilization. This late splitting is what leads to the unique mirrored characteristics. Although they are genetically identical, this delay causes their mirrored traits.

While mirror twins often have mirrored physical traits, their personalities may not necessarily be opposites. Like siblings, their environments, experiences, and interactions shape their personalities. They might have some complementary traits, but it's not a given that if one is outgoing, the other is introverted.

There isn't a specific test for identifying mirror twins. It's more about noticing those mirrored physical traits and features, such as where birthmarks are located or which hand is dominant. For some conditions, like if their internal organs are mirrored (situs inversus), imaging tests like X-rays or ultrasounds can confirm it.

Yes, in some instances, mirror twins might experience health conditions in mirrored locations. For example, if one twin has a condition affecting the right lung, the other might have a similar condition in the left lung. However, it's important to remember that this isn't always the case, and each twin is an individual with unique health needs.

Many mirror twins share an incredibly close connection, possibly because they share genetics and mirrored traits that make their relationship unique. Some even report having a form of telepathy, experiencing each other's emotions or pain, which can make their bond seem even more magical.