A little brown discharge in the sixth month of pregnancy is a small amount of bleeding and is usually not serious if it is not heavy. Brown discharge in the sixth month of pregnancy is mostly caused by placenta hypoplasia or instability of the fetus due to high activity or emotional instability. Placenta hypoplasia means that the placenta is closer to the cervical opening and in a lower position, which may cause a small amount of bleeding, which can be determined by ultrasound, and if there is placenta hypoplasia, bed rest is needed to preserve the fetus. Pregnancy activities, emotional instability can cause fetal instability, then also cause a small amount of brown discharge, you can appropriate more rest, to see if it can be relieved, if not relieved, need to consult the examination to find the cause. In addition, during pregnancy, pay attention to the pregnancy test do not labor, maintain emotional stability, pay attention to eat more fruits and vegetables.