Although in many cases the exact cause of cleft lip palate is not entirely known, experts believe that underlying factors like genetics, environment and exposure to certain toxins may play a role in this condition, explains the American Academy of Otolaryngology-Head and Neck Surgery. In addition, another cause can be certain medications that a mother may take while she is pregnant, relates WebMD.
Cleft lip/palate is condition in which there is a separation in both the upper lip and at the roof of the mouth. This malformation can develop in early pregnancy. This condition can account for 50 percent of all cleft cases, reports the American Academy of Otolaryngology-Head and Neck Surgery. Treatment for a cleft lip/palate can be surgical repair of the malformation.