Mirror twins are medically referred to as mirror-image twins. They occur when a fertilised egg splits later than usual, typically between seven to twelve days after conception. This blog discusses what are mirror twins and how they can be identified.
What Is Meant by Mirror Twins?
The delayed division of a fertilised egg leads to twins with identical genetic makeup, yet they exhibit physical and behavioural traits as though they are mirror images of each other.
For instance, one twin may be right-handed while the other is left-handed. Even their hair whorls might spiral in opposite directions. In extreme cases, internal organs like the liver or heart might be mirrored, though this is rare and medically referred to as situs inversus. These “mirror” traits make mirror twins a rare subset of monozygotic (identical) twins.
How Are Mirror Twins Identified?
Identifying mirror twins involves observing their behavioural and physical characteristics. Here are some key indicators to observe:
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Physical Traits
One twin’s dimple, mole, or birthmark might appear on the opposite side of their sibling. Similarly, features like the dominant hand often mirror each other.
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Behavioural Traits
Mirror twins may exhibit opposing habits or preferences. For instance, one might favour sleeping on their right side while the other favours the left.
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Medical Testing
Medical imaging can sometimes confirm mirrored skeletal structures or internal organs. DNA tests, however, might not differentiate mirror twins from regular twins since they share identical genetic material.
Parents or guardians usually notice these mirrored traits as the twins grow.
Conclusion
Mirror twins are a rare form of identical twins, characterised by their mirrored behavioural and physical traits. While they share the same DNA, their opposite characteristics make them unique.
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Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.