Just a note, "hermaphrodite" is a wildly inaccurate term to define those with an indeterminate sex within the dichotomy of male/female and can be quite offensive as well, especially when used outside of specific cases (none of which I've ever heard to be identified accurately as strictly hermaphroditic)
Hermaphroditism is incredibly rare, but there are recorded cases (including cases of births involving hermaphrodites: according to http://www.ncbi.nlm.nih.gov/pubmed/18394621 there were 11 reported cases of fertility in true hermaphrodites)
