There are many causes of ear deformities in newborns, the etiology of which is not particularly clear at the moment, but some of them do have a genetic predisposition, and hereditary factors can account for about 20% of patients with ear deformities, which need to be genetically diagnosed for the process of having a second child. If the ear deformity in the first-born baby is due to genetic factors, the second-born baby may have ear deformity in 20%-40% of cases. Ear deformities can be affected by some medications, for example, during pregnancy due to the use of some anti-flu drugs, retinoids and other drugs that are contraindicated for pregnant women, may cause ear deformities in the fetus or newborn. Some pregnant mothers may suffer from unexplained colds or infections caused by respiratory and digestive disorders during pregnancy, which may also lead to ear deformities. In addition to this, some pregnant women are exposed to toxic chemicals or radiation during pregnancy for a long period of time, which may put the baby at risk of ear deformities. Regarding the genetic factor, whether ear deformity can be inherited by the next generation, although it is true that some ear deformities have been proven to have a family aggregation, it accounts for a very small percentage compared to the previous types of ear deformities caused by, for example, drug infections and pollution factors.