Fingerprints are patterns of ridges that form on our fingers, palms, toes, and feet. Fingerprints are unique, even among identical twins. They are formed while we are in our mother’s womb and are influenced by several factors. These factors include genetic makeup, position in the womb, amniotic fluid flow, and umbilical cord length. Fingerprints are formed in the innermost layer of the epidermis known as the basal cell layer. Rapid cell growth in the basal cell layer causes this layer to fold and form various patterns.