Labor may not be induced with Levano in the following cases: first, acute inflammation of the reproductive tract. Secondly, labor should not be induced in cases of serious internal diseases, such as abnormal liver and kidney functions or during the acute stage of certain diseases. Third, coagulation disorders and thrombocytopenia are not allowed to induce labor. Fourth, labor cannot be induced if the body temperature exceeds 37.5℃ or more on 2 occasions within 24 hours. Fifth, labor cannot be induced with Levano if there is a history of allergy to Levano. Sixth, uterine developmental abnormality can not use Levano to induce labor. The above are the contraindications to induce labor with Levano, it is recommended to do a detailed examination before inducing labor, through ultrasound, blood test, combined with the past medical history and then decide whether it is possible to induce labor with Levano, before inducing labor, there must be a family member signing consent to the operation.