What causes brown discharge in late pregnancy?

Brown discharge in late pregnancy is a sign of labor and may also be related to vaginitis.
1. Signs of labor: In late pregnancy, as the fetal membranes at the cervical opening are separated from the uterine wall and then peeled off, leading to the rupture of nearby capillaries and a small amount of bleeding, the blood will be combined with the mucus secreted by the cervix and discharged from the vagina, and you will see a brown discharge.
Usually, 1-2 days after the brown discharge is seen, the pregnant woman will experience regular contractions in preparation for labor.
2. Vaginitis: If brown discharge occurs when you are far away from your due date, it may be caused by vaginitis, which is accompanied by symptoms such as itching and burning of the vulva in addition to brown discharge. Pregnant women need timely treatment so as not to affect labor.
Therefore, when brown discharge occurs in late pregnancy, it is recommended that pregnant women go to the obstetrics department for relevant ultrasound or gynecological examination to clarify the cause and prepare for delivery, or actively treat the disease.