1 out of 735 births.
Clubfoot is one of the oldest birth defects known to man.
There are Egyptian mummies with clubfoot. It occurs twice as often in boys as girls. Clubfoot is commonly an isolated, ideopathic form, occurring in an otherwise normal infant, but can also be associated with other congenital deformities such as amniotic band syndrome, spina bifida, and arthrogryposis. It can skip many generations, so look way back in your family tree. In most cases, the cause of clubfoot isn't known.