38 weeks more than a small amount of brown discharge, may be near labor, placenta praevia, vaginitis and so on. 1. Prolonged labor: 38 weeks more than full-term, at any time of labor, in the 24-48 hours before delivery, the cervical opening began to dilate, at this time the fetal membranes near the cervical opening and the uterine wall separation, there will be blood vessel rupture, a small amount of bleeding. 2. Placenta praevia: Placenta praevia is a condition in which the lower edge of the placenta is adjacent to or covers the inner mouth of the cervix after 28 weeks of pregnancy. As the pregnancy grows, it will lead to misalignment between the lower part of the uterus, the mouth of the cervix, and the placenta, so there will be bleeding symptoms. 3. Vaginitis: higher hormone levels during pregnancy can lead to vaginal flora imbalance vaginal inflammation, vaginal inflammation is more serious, it will lead to vaginal mucosal congestion and edema, there will also be a small amount of bleeding, usually accompanied by itching and other discomforts. There may be other reasons for the small amount of brown discharge at 38 weeks, it is recommended to go to the hospital in time, improve the examination to clarify the cause, and then give targeted treatment or treatment under the guidance of the doctor.