There are numerous types of anal anomalies, and the location of the blind end of the rectum and fistula varies. Its incidence is 1:1500-5000 in newborns, accounting for the first place of GI malformations. There are more males than females, and high-grade malformations account for about 50% in males and 20% in females. The incidence of various fistulas is 90% in females and 70% in males. The incidence of combined other congenital malformations is about 30-50%, and they are often multiple. A family history is rare, only 1%. There is heredity, but the mode of inheritance is inconclusive. So, how can anal malformations be prevented? The following are the prevention methods for anal malformations. 1, mommy can not eat food containing pesticide residues, food additives or preservatives when she is pregnant with her baby, because these substances contain a large number of chemicals, these chemicals enter the mother’s body, through the mother changed the environment of fetal development, especially the rectum and anus has the greatest impact, which leads to fetal malformations. 2, during pregnancy, the mother should pay attention to protect themselves, as far as possible not to make themselves sick, even if sick, it is best not to inject, take medicine, because some drugs contain a small amount of lead, arsenic, cadmium, mercury, etc., these small amounts of things do not have any effect on the mother, but they have a great impact on the fetus, inducing fetal malformations. 3, the healthy growth of the baby is not only directly related to the mother, the father should also do some prevention, in the process of fetal development, the father can not smoke, drink, etc., cigarettes and wine contain a lot of substances that are not good for the baby, the same will cause the baby to develop deformities. Note: To give birth to a healthy baby, I think the future parents should pay attention to many aspects of life in general, only then can avoid a variety of bad factors to make the baby deformed.