Birth control is a treatment method and not everyone who needs it will be able to keep the fetus successfully. Therefore, it is uncertain whether the process of birth control will be successful if there is a brown discharge. A brown discharge is a small amount of vaginal bleeding. If you see the fetal heart and fetal bud during ultrasound, it is still normal and you need to continue the fetal preservation treatment. If the embryo stops developing, it is necessary to perform the operation to remove the uterus immediately, in this case, it is inevitable miscarriage, and it is meaningless to continue to keep the fetus. Therefore, in the process of fetal preservation, if brown discharge occurs, the cause of bleeding should be identified. Because of chronic cervical inflammation, cervical polyps or precancerous lesions of the cervix, brown discharge may also occur.