The causes of preterm birth are numerous, and prevention mainly involves addressing these causes. For etiological reasons, proactive treatment of some chronic diseases is necessary. For pregnant women with a history of preterm birth, it is crucial to pay close attention two to three weeks before the previous preterm birth date. They should avoid overexertion, abstain from sexual activity, and rest in bed until the expected due date. It is also important to identify the causes of preterm birth, such as cervical insufficiency. If so, a cerclage surgery can be performed around the 14th week of pregnancy. If a pregnant woman shows signs of labor or preterm birth, she should be given oxygen immediately, and an injection of vitamin K should be administered to prevent intracranial hemorrhage in the newborn.