Premature birth refers to delivery between 28 to 36 weeks plus 6 days of pregnancy. Due to the lower body weight and immature organ development of the fetus, premature birth can lead to decreased survival rates and increased morbidity in newborns. The signs of impending premature birth include the following aspects: First, the occurrence of regular contractions, which are the most common sign of premature birth. If intermittent lower abdominal pain occurs, it should be taken seriously, and fetal heart rate monitoring may be necessary for assessment. Second, the appearance of blood in the vaginal discharge often indicates that the fetal presenting part is descending, which is also a sign of premature birth. Third, a physical examination may reveal shortening of the cervical canal and dilation of the cervix, suggesting the possibility of premature birth. When these conditions occur, they should be taken seriously, and medication may be necessary for treatment. (Specific medications should be used under the guidance of a physician.)