Probabilities and human pubic hair comparisons.

By use of a card coding system for some macroscopic and microscopic characteristics of human pubic hairs, 101 368 comparisons were made between 454 hairs from 60 different individuals. Of these, 16 pairs were found to be similar. For a Caucasian population, it is estimated that if one human pubic hair is found to be similar to at least one of a group of six to eleven mutually dissimilar hairs from a given source, the probability that it could have originated from another source is small, about 1 in 800.