“Hemophilia statistics by CDC:

• As many as 33,000 males are estimated to be living with hemophilia in the United States.
• Hemophilia is associated with spontaneous (unexplained) bleeding and excessive bleeding after injury. This can include repeated bleeding within joints that can lead to chronic joint disease.
• Bleeding symptoms in females with hemophilia are usually milder than symptoms in males with hemophilia. Nonetheless, females with hemophilia have been found to have reduced joint range of motion compared with females with no bleeding disorder.
• Among all males with hemophilia, just over 4 in 10 have the severe form of the disorder.”

Center for Disease Control and Prevention-CDC (https://www.cdc.gov/hemophilia/data-research/index.html)