What percent of human babies are born with tails?

Approximately 1 in 100,000 human babies are born with a condition known as a "true tail," which is a small, non-functional appendage resembling a tail. However, most cases of "tail" in newborns are actually vestigial structures or skin tags, rather than true tails. Overall, the occurrence of true tails in humans is extremely rare, making the percentage negligible.