Hemophilia is a rare disorder that primarily affects males, which causes blood not to clot properly—it is very rare for true hemophilia to affect females. [1] Like many rare disorders, hemophilia is caused by genetics. Women are more likely to be carriers of the genes that cause hemophilia, but it was not until fairly recently it was realized that even though these women do not have hemophilia, that they can still experience bleeding related symptoms. [1]