How are fingerprints formed in the womb?

Innumerable environmental factors influence the formation of fingerprints, including the exact position of the fetus in the womb at a particular moment and the exact composition and density of surrounding amniotic fluid that's swirling around the fingers as they touch surrounding structures. And that's what decides how every individual ridge will form. The entire development process is so chaotic that, in the entire course of human history, there is virtually no chance of the same exact pattern forming twice. « Collapse