If the cervical opening is loose after pregnancy, you should avoid strenuous exercise, prohibit sexual intercourse, rest in bed and avoid vaginal bleeding. If the symptoms are serious, you can take medication to suppress contractions as prescribed by the doctor, and if necessary, cervical cerclage is required. After cervical cerclage, you should elevate your hips and rest in bed to prevent contractions from causing the fetus to drop and deliver, minimize strenuous exercise and heavy physical labor, and avoid sexual intercourse. Check the length of the cervical canal every 2 weeks during labor and delivery. If there is irregular lower abdominal pain in late pregnancy, labor may be imminent and the cervical sutures need to be removed promptly to avoid cervical laceration in case of regular contractions. The causes of cervical canal laxity are congenital factors, such as female uterine dysplasia, and acquired factors, such as multiple abortions and frequent internal examinations. Therefore, women should pay attention to reasonable contraception and reduce unnecessary internal examinations to prevent loosening of the cervical opening and large opening, which may affect the function of the cervix and subsequently lead to difficulty in keeping the baby and habitual abortion. In addition, during pregnancy, you should eat a light diet rich in high quality protein, high vitamin and easy to digest, and pay attention to strengthening nutrition to ensure the supply of fetal nutrition. During pregnancy, you should stop smoking and drinking, avoid exposure to radiation sources and strenuous exercise, and keep your mood relaxed.