A change in discharge from brown to yellow in early pregnancy is caused by the cessation of vaginal bleeding. There is a possibility of preeclampsia in early pregnancy, where the embryo is dislodged from the uterine wall, causing bleeding. A small amount of bleeding from a preeclampsia can cause a brown discharge when it stays in the uterine cavity for a long time. After taking birth control medication or bed rest, the bleeding slowly stops, and the discharge turns from brown to yellow, and then gradually to clear or egg-white discharge. Acute cervicitis or cervical polyps, vaginal discharge is yellow discharge, sexual stimulation and other reasons lead to cervical mucosal bleeding, bleeding less and cervical-vaginal discharge mixed with brown discharge. After medication or cervical mucosal bleeding stops on its own, the vaginal discharge changes from brown to yellow, and may be accompanied by vulvar itching and increased vaginal discharge. Early pregnancy discharge is brown need to consult a doctor in time, under the guidance of the doctor to identify the causes, and give appropriate treatment.