Cervical length may no longer be of concern after 34 weeks of gestation, but it is also combined with the presence of maternal-fetal complications. Preterm labor is defined as delivery at 28 weeks of gestation but less than 37 weeks. Preterm infants are at high risk for adverse perinatal outcomes because their organs are not yet well developed. Pregnant women with symptoms of preterm labor or risk factors should be monitored for cervical tube length to assess the risk of preterm labor, which is generally not a concern at ≥34 weeks of gestation and should be allowed to run its course. Pregnant women with high risk factors (e.g., cervical insufficiency, history of preterm labor, etc.) should undergo preterm labor prediction testing, which can help to assess the risk of preterm labor and provide timely and proactive management. Therefore, it is important to be punctual during pregnancy, and when there are symptoms of preterm labor such as abdominal pain and shortening of the cervical canal, it is necessary to follow the doctor’s instructions to actively give birth control treatments to inhibit contractions and to promote the maturation of the fetus and the lungs.