Strange baby related medical stories..
https://goo.gl/0IgLku
In rare cases, human babies can be born with tails
During fetal development, at about the 5th week, the human embryo has a tail that usually disappears by the 8th week, being absorbed by the growing embryo. However, in some cases the tail is not absorbed and persists through birth. It is considered a vestigial trait, meaning a trait that has lost most of their original function through evolution.