There are many kinds of manifestations of successful birth control, mainly divided into the following points: First, the abdominal pain of female patients will gradually disappear, because abdominal pain is a precursor symptom of miscarriage, the pain level is obvious when this situation occurs, if the pain disappears gradually after treatment, it means that the birth control is successful. The vaginal bleeding of the patient will also disappear gradually, this situation is the same as the abdominal pain, it is one of the aura of miscarriage, if you find that the patient has vaginal bleeding must go to the hospital for treatment in time, after examination and then for the cause of treatment, if the bleeding symptoms disappear gradually after treatment, it means that the birth control is successful. Thirdly, the cervical canal of the patient does not appear to be significantly shorter or longer, and the opening of the uterus becomes closed from the open state, which are all signs of successful birth control.