The brown discharge during pregnancy is not normal, first of all, we must determine whether it is early or mid-late pregnancy, early pregnancy may be caused by inflammation or miscarriage, mid-late pregnancy is considered to be low placental position or premature birth, as follows: 1, early pregnancy: early pregnancy brown discharge, most of them are related to inflammation or miscarriage, inflammation may be vaginitis, cervical inflammation, cervical polyps, vaginitis, vaginal mucous membrane bleeding, cervical polyp bleeding, etc. Most of the miscarriages are caused by the problems of the gestational sacs’ bed, placenta, early pregnancy when the fetal placenta is not formed, easy to miscarriage bleeding; 2. Middle and late stage: the bleeding in the middle and late stage is usually caused by the low position of the placenta, this cause is more common, there are also the symptoms of preterm labor, prolonged labor, a small amount of bleeding caused by the shortening of the cervix. All these cases are the need to go to the hospital and let the doctor identify to see what is causing the brown discharge from pregnancy bleeding.