The symptoms of vaginal bleeding will occur after the induction of labor because there will be a small amount of accumulated blood and meconium discharge within the uterine cavity, and the bleeding time depends on the following factors: 1. Size of pregnancy week: if labor is induced before 20 weeks of pregnancy, the general bleeding time is 3-5 days, and the longest time is not more than 1 week; if labor is induced after 20 weeks of pregnancy, the uterus is larger, and the bleeding duration may reach 10-14 days, and more than 14 days is abnormal. Second, whether there is residue in the uterine cavity: 1, no residue: the bleeding is equivalent to normal puerperal bleeding, the bleeding amount reaches the menstrual amount, usually lasts 3 days of bloody discharge, after that lasts 10 days of light bloody discharge, after 2 weeks it changes to white discharge, after 3 weeks it turns to normal; 2, there is residue: if there is persistent vaginal bleeding for more than 14 days and the bleeding amount is more or larger than menstrual amount, you need to go to the hospital in time. After the induction of labor, the bleeding time should be observed. If there is bleeding for more than 14 days, or if the bleeding volume is high and reaches or exceeds the menstrual volume, you should consult a doctor at any time and use targeted medication and treatment under the guidance of the doctor.