Clefts lip and cleft palate are common congenital anomalies.The etiology of clefting is complex.It is very likely that both genetic and environmental factors contribute to this malformation.

• 唇腭裂是一种常见的先天性畸形，其病因非常复杂，目前倾向认为是由多种基因和环境因素共同作用的结果。