Cleft lip and palate, commonly known as "rabbit's lip" and "wolf's throat", is caused by the development of upper lip and palate in embryonic period. According to statistics, the incidence of cleft lip and palate is about1/800 ~11000, which means that the number of neonatal cleft lip and palate patients increases at the rate of1/800 ~1000 every year. It can be seen that in order to make children truly have complete physical and mental health, surgery is only its treatment, and it is fundamental to remove the cause, do a good job of prevention and reduce the birth of deformed children. B-ultrasound can help to diagnose fetal malformation to a great extent, but the position of the fetus and amniotic fluid may affect the judgment of the results. Therefore, from the perspective of eugenics, it is very important to prevent genetic diseases and try to avoid factors that easily lead to fetal malformation during pregnancy. The main causes of cleft lip and palate are: genetic factors. The disease is polygenic, and 20% ~ 30% of patients have positive genetic factors. We can often see similar deformities in the relatives of patients. The prevention of the next generation of genetic diseases begins with the mate selection and marriage of this generation. If I suffer from this genetic disease, I should avoid falling in love with people with the same genetic disease, prevent patients with the same genetic disease from marrying each other, and never marry patients with cleft lip. Because of the marriage between such patients, the probability of their offspring suffering from the same genetic disease as their parents will increase significantly. Marriage law stipulates that consanguineous marriage is also the reason, because the incidence of recessive genetic diseases in offspring of consanguineous marriage will be significantly higher than that in the general population. Environmental factors: mother infected with virus during pregnancy, exposed to X-ray, microwave, mechanical damage, environmental pollution, lack of oxygen, etc. , can cause genetic mutations. Drug factors such as vitamin deficiency during pregnancy, the use of hormones or anti-tumor drugs may lead to fetal malformation. The data of alcohol and tobacco factors show that the incidence of cleft lip and palate in pregnant women's children is higher than that in pregnant women without alcohol and tobacco hobbies. I really gave birth to a child with cleft lip and palate, and the development of modern medicine can make up for it to the greatest extent. The best surgical repair time of cleft lip is: unilateral cleft lip 3 ~ 6 months, bilateral cleft lip 6 ~ 12 months; The minimum age of cleft palate surgery can be 2 ~ 3 years old. Li Li, Department of Stomatology, Second Xiangya Hospital, Central South University, launched the "Smile Through Train" activity, operated on patients with congenital cleft lip and palate for free, and treated thousands of such congenital malformations. Cleft lip and palate, commonly known as "rabbit's lip" and "wolf's throat", is caused by the development of upper lip and palate in embryonic period. According to statistics, the incidence of cleft lip and palate is about1/800 ~11000, which means that the number of neonatal cleft lip and palate patients increases at the rate of1/800 ~1000 every year. It can be seen that in order to make children truly have complete physical and mental health, surgery is only its treatment, and it is fundamental to remove the cause, do a good job of prevention and reduce the birth of deformed children. B-ultrasound can help to diagnose fetal malformation to a great extent, but the position of the fetus and amniotic fluid may affect the judgment of the results. Therefore, from the perspective of eugenics, it is very important to prevent genetic diseases and try to avoid factors that easily lead to fetal malformation during pregnancy. The main causes of cleft lip and palate are: genetic factors. The disease is polygenic, and 20% ~ 30% of patients have positive genetic factors. We can often see similar deformities in the relatives of patients. The prevention of the next generation of genetic diseases begins with the mate selection and marriage of this generation. If I suffer from this genetic disease, I should avoid falling in love with people with the same genetic disease, prevent patients with the same genetic disease from marrying each other, and never marry patients with cleft lip. Because of the marriage between such patients, the probability of their offspring suffering from the same genetic disease as their parents will increase significantly. Marriage law stipulates that consanguineous marriage is also the reason, because the incidence of recessive genetic diseases in offspring of consanguineous marriage will be significantly higher than that in the general population. Environmental factors: mother infected with virus during pregnancy, exposed to X-ray, microwave, mechanical damage, environmental pollution, lack of oxygen, etc. , can cause genetic mutations. Drug factors such as vitamin deficiency during pregnancy, the use of hormones or anti-tumor drugs may lead to fetal malformation. The data of alcohol and tobacco factors show that the incidence of cleft lip and palate in pregnant women's children is not higher than that of pregnant women who know about alcohol and tobacco hobbies. I really gave birth to a child with cleft lip and palate, and the development of modern medicine can make up for it to the greatest extent. The best surgical repair time of cleft lip is: unilateral cleft lip 3 ~ 6 months, bilateral cleft lip 6 ~ 12 months; The minimum age of cleft palate surgery can be 2 ~ 3 years old.