In the course of pregnancy, if there is a light brown discharge, it is abnormal. Light brown discharge, in the early stages of pregnancy, is associated with preeclampsia. If the pregnant woman is not resting well, the embryo is unstable, or emotionally unstable, etc., it may lead to, and needs to be treated with birth control. Light brown discharge in the middle of pregnancy, the first thing to consider the cervix, as well as placental factors. Inflammation of the cervix, placenta praevia, placenta praevia, etc. may cause light brown discharge. In addition, it is generally recommended not to have intercourse during pregnancy. If you have sex during pregnancy, sexual stimulation may also cause abdominal pain and vaginal bleeding.