If a pregnant woman is able to continue her pregnancy after dexamethasone injection, it is recommended that the pregnancy be carried to full-term labor and delivery, depending on the maternal and fetal conditions. Usually, glucocorticoids should be used to promote fetal lung maturation in fetuses less than 35 weeks of age that are likely to be delivered within one week. It promotes the synthesis of fetal lung surface active substances and reduces the incidence of postnatal respiratory distress syndrome in newborns. Dexamethasone injection 6 mg intramuscularly every 12 hours for 4 doses or betamethasone injection 12 mg intramuscularly and repeated 24 hours later. If the possibility of preterm labor at <34 weeks still exists more than 2 weeks after administration, a course of treatment may be repeated. As dexamethasone belongs to the class of glucocorticoid drugs, it may cause some side effects after use, such as elevated blood glucose, increased chance of infection, etc. Therefore, it is necessary to use it in strict accordance with medical advice.