Fingerprints are a prime example of a feature that can uniquely identify an individual, distinguishing them from anyone else in the world.
However, like many other physical traits, fingerprints are influenced by genetics.
Consequently, one’s fingerprints may share certain similarities with those of parents or siblings due to heredity.

Fingerprint patterns can be broadly categorized into three types.
The first is the “whorl,” characterized by a spiral or circular shape.
The second is the “loop,” where the ridges emerge from one side and curve back toward the same side.
The third is the “arch,” where the ridges enter from one side and exit toward the opposite side.

While genetics play a significant role in determining which pattern type a person has, every individual’s fingerprints are ultimately unique.

So, what about identical twins, who originate from the division of a single fertilized egg?
To give the conclusion upfront: naturally, their fingerprints differ as well.

Identical twins share the same DNA because they develop from a single fertilized egg.
However, since fingerprints are determined by a combination of innate genetic factors and postnatal environmental influences, they differ even between identical twins.

Fingerprint formation begins around the ninth week of pregnancy and is largely complete by the fifth month.
It is fascinating to consider the mechanism by which subtle environmental differences—such as the fetus’s position in the womb, the rate of nutrient absorption, and the condition of the amniotic fluid—result in distinct fingerprints, even for identical twins.