Even though cleft lips and palates are the most common congenital facial deformations it is still not fully known what actually causes them. There is no single reason for cleft. Rather, there are genetic and environmental influences that make it more likely, but not certain, that a child is born with a cleft condition:
Many people still believe that cleft is given by god or that it is related to lunar or solar eclipses. This is not true. Also, no person can be made responsible for the deformity.