Brown discharge in the 6th month of pregnancy suggests a small amount of vaginal bleeding. There are many reasons for this, the first and most common one being preterm abortion. It presents as mild abdominal pain with paroxysmal vaginal bleeding in small amounts, which can be relieved with rest, and if the symptoms gradually worsen it is necessary to go to the hospital for fetal preservation treatment. If the lowest position of the placenta is close to the cervical opening or even covers the cervical opening, it indicates the possibility of low placenta or placenta praevia, which should be taken seriously because of the possibility of hemorrhage. Other causes may also be present, such as cervical polyps, cervical tumors, etc. Therefore, the appearance of brown discharge in the 6th month of pregnancy must be seen by a specialist at the hospital.