What is brown discharge during pregnancy?

I have been pregnant for more than a month, and brown discharge suddenly appeared in the vagina today. I would like to ask what is the brown discharge during pregnancy?

Brown discharge during pregnancy is generally related to the following reasons: 1. Threatened miscarriage, if the embryonic development is unstable, or the pregnant woman has some kind of disease, it is easy to increase the possibility of threatened miscarriage. Cause abdominal pain, brown vaginal discharge and other phenomena. 2. Gynecological inflammation. Pregnancy is a special period for women. At this time, the body's immunity and resistance are relatively weak. If you do not pay attention to personal hygiene, it is easy to cause pathogenic microorganisms to invade the human body, thereby causing gynecological inflammation. For example, endometritis, cervicitis, etc., may also occur during the illness. 3. Ectopic pregnancy. If the pregnant woman also has abdominal pain, you need to be alert to the possibility of ectopic pregnancy.