The vast majority of just after the injection to induce labor will not have any reaction, but about 24 hours after the injection to induce labor or even 36 hours later, will gradually appear lower abdominal pain, vaginal discharge increased and other phenomena. With the further strengthening of the pain in the lower abdomen, the strengthening of contractions, the opening of the mouth of the uterus will be excluded from the products of pregnancy, in the clinic should pay attention to is to pay attention to after the induction of labor: 1, the change of temperature, whether there is a fever, if there is a fever, it may be caused by infection. 2, pay attention to the vagina whether there is bleeding, or whether there is a watery vaginal secretion, if the bleeding is not more than the menstrual period, it is a normal phenomenon; if the vagina is not more than the menstrual period, it is a normal phenomenon. If the bleeding does not exceed the amount of menstruation, it is a normal phenomenon; if the vaginal bleeding exceeds the amount of menstruation, you should go to the doctor in time, and if necessary, you need emergency treatment. If there is watery discharge from the vagina, it may be due to water breaking and further examination is recommended.