Reminder 1: High risk of multiple pregnancies In recent years, the use of ovulation-promoting drugs in the treatment of infertility has led to a significant increase in the rate of multiple pregnancies, and the relationship between multiple pregnancies and cerebral palsy is increasingly attracting the attention of the medical community. The incidence of preterm birth and low birth weight is significantly higher in multiples than in singletons. Experts believe that the reasons for this may include: multiple pregnancies tend to lead to a relative lack of placental function; interfetal transfusion syndrome can cause fetal anemia, low birth weight, heart failure, etc.; multiple pregnancies are also prone to combined amniotic fluid and premature rupture of membranes, etc. Reminder 2: Be alert to trauma during pregnancy Some studies have shown that trauma during pregnancy mostly occurs in late pregnancy, and trauma during pregnancy is closely related to the onset of cerebral palsy in mothers. In addition, trauma during pregnancy can cause reduced placental blood flow, placental thrombosis and premature rupture of fetal membranes, and even a small trauma can cause fetal death or premature birth. Reminder 3: Pregnant women’s cardiopulmonary diseases Cardiovascular and respiratory dysfunction can lead to cerebral ischemia in preterm infants, such as ductus arteriosus, hypotension, pneumothorax, bronchopulmonary dysplasia, respiratory distress syndrome, etc. Reminder 4: Cold and flu during pregnancy, drug abuse Drug abuse by mothers can lead to abnormal fetal neurological development, such as intrauterine growth retardation and attention deficit in fetuses of drug-addicted mothers. Reminder 5: Radiation Exposure of pregnant women to radiation and other radiation can lead to cerebral palsy, cerebellar malformation and mental retardation.