The following effects may occur if the medication is suddenly stopped: 1) the medication will not achieve the corresponding treatment purpose and the desired result; 2) it will cause withdrawal bleeding, and once withdrawal bleeding occurs, it is relatively difficult to stop bleeding when treatment is carried out with hemostatic drugs. The medication must be used under the guidance of a doctor and in strict accordance with the time of taking the medication to ensure that the purpose of the medication is to achieve the therapeutic effect and not to cause endocrine disorders leading to irregular bleeding, so it is important to take the dydrogesterone tablets carefully and strictly in accordance with medical advice.