After the successful treatment of birth control, brown discharge can usually stop appearing in 3-7 days, but if the embryo is poorly developed and there is more blood accumulation in the cervix, it will take a longer period of time for the brown discharge to stop. I. Embryo development status: 1. Better development: If the embryo is well developed, the brown discharge is caused by factors such as exertion and emotional excitement, and usually the brown discharge can be gradually reduced about 1 week after the birth control treatment; 2. Poor development: If the embryo is abnormally developed, the duration of the brown discharge may gradually ease after half a month, and there may also be continuous vaginal bleeding due to the failure of birth control. 2. Accumulated blood in the cervix: if the vaginal bleeding is not discharged, accumulation of blood may form in the uterine cavity, and the disappearance time of the discharge needs to be judged according to the amount of accumulated blood. 1. Less accumulated blood: after 1 week of treatment with birth control drugs, the amount of accumulated blood in the uterine cavity will be rechecked, and when it starts to decrease or there is no fresh bleeding, usually there will be no brown discharge in 3-7 days; 2. More accumulated blood: if the amount of accumulated blood in the uterine cavity is more or the effect is poor after medication, the accumulation of blood continues to increase, it may take 1 month to have relief. It is necessary to pay attention to proper rest, wash the vulva with water, change the underwear regularly to avoid vulva infection, maintain a good state of mind, avoid excessive anxiety, tension and other adverse emotional effects after the birth control treatment.