Brown discharge in early pregnancy is considered to be caused by a prior miscarriage, ectopic pregnancy or cervical polyps and other diseases. 1. Pre-eclampsia: Pre-eclampsia manifests itself as a small amount of vaginal bleeding before the 28th week of gestation, accompanied by paroxysmal abdominal pain, the cause of which is related to the embryo, the mother, the father, and environmental factors, which can lead to brown discharge in the early stages of pregnancy. 2. Ectopic pregnancy: brown discharge in early pregnancy may also be ectopic pregnancy, caused by the fertilized egg in the uterine body cavity outside the site of the bed development, manifested in menopause, abdominal pain, vaginal bleeding, etc., the cause of the fallopian tube-related lesions, contraceptive failure and so on. 3. Cervical polyps: the cause of cervical polyps is not yet clear, may be related to chronic inflammation, cervical infection, etc., the patient will have abnormal vaginal bleeding, leukorrhea and other symptoms. If you suffer from cervical polyps during pregnancy, you will experience brown secretions in early pregnancy. There are more reasons for brown discharge in early pregnancy, and it is necessary to consult a doctor in time to exclude the possibility of preeclampsia and ectopic pregnancy.