Suggestion: Hello, there are usually the following causes of cleft lip and palate: virus infection: such as upper respiratory tract infection of pregnant women, rubella is also one of the answers to the causes of cleft lip and palate. Drug effects: such as taking antiepileptic drugs, cholesterol-lowering drugs, antiallergic drugs and anticancer drugs. Endocrine: Mental or traumatic factors, such as intense mental stimulation and external physical injury, are the answers to the question of the causes of cleft lip and palate. Nutritional factors: vomiting, anorexia and partial eclipse in early pregnancy lead to vitamin D, folic acid, iron and calcium deficiency. What are the other causes of cleft lip and palate? For example, X-ray irradiation, smoking, alcoholism and lack of oxygen. In addition, a considerable part of cleft lip and palate is hereditary. Generally, the probability of cleft lip and palate in the first child is 1/600. If the first child is cleft lip and palate, the probability of cleft lip and palate in the second child is 3/ 100. Older parents are also the cause of cleft lip and palate. The older the parents are, the greater the chance of children suffering from congenital cleft lip and palate. In order to reduce the chance of cleft lip and palate, parents should have a lower childbearing age. Pregnant women should not smoke, drink or take drugs during pregnancy, but also maintain a good and healthy attitude to avoid the occurrence of congenital children. Although there are many answers about what causes cleft lip and palate, these causes can be well avoided. As long as you take life seriously, cleft lip and palate will not meet you.