Occurrence and causes of cleft lip and palate

On an average, one in every 700 children worldwide is born with a cleft. It is the fourth most common birth defect, and the first most common facial birth defect.

Causes

Genetic factors: Sometimes a cleft can be genetic. The risk may be higher for children whose sibling(s) or parents have a cleft or who have a history of cleft in their families. Consanguineous marriage (marriage between close relatives or cousins) can also be a cause.

Environmental factors: Not all birth deformities are hereditary. Even in the absence of any genetic factors, there are some external factors that may result in cleft formation.

1.Maternal exposure to smoking, use of tobacco, illicit drugs or alcohol consumption during pregnancy is extremely harmful for the developing baby.