Brown discharge at six weeks of early pregnancy may be caused by pre-miscarriage, ectopic pregnancy, inflammation and infection, biochemical pregnancy and so on. 1. Pre-eclampsia: Pre-eclampsia can be characterized by brown discharge and abdominal pain. If there is too much mental stress, overwork, or poor fetal development in the pre-pregnancy period, it can cause premonitory miscarriage. 2. Ectopic pregnancy: If the fetus is deposited outside the uterine cavity, ectopic pregnancy may also have brown discharge. 3. Inflammatory infections: lack of personal hygiene in daily life may cause the invasion of bacteria and viruses, resulting in brown discharge. 4. biochemical pregnancy: in the early stages of pregnancy the fetus stops growing, biochemical pregnancy will also have brown discharge. In the clinical six weeks of early pregnancy with the appearance of brown discharge, it is recommended to consult a doctor in time to determine the cause, and targeted treatment.