In general, most of the pregnant women do not have brown discharge, a few pregnant women will have a small amount of brown discharge in about 30 days of pregnancy due to the period of implantation. After pregnancy due to the rise in hormone levels, most pregnant women will experience early pregnancy reaction, frequent urination, breast swelling and pain and other symptoms of early pregnancy, generally there is no symptom of vaginal flow of brown discharge. However, a small number of pregnant women will have a small amount of bleeding during the period of implantation when they are about 30 days pregnant, which is a normal physiological phenomenon and does not require special treatment. When there is brown vaginal discharge during early pregnancy, it may be caused by preeclampsia, ectopic pregnancy and cervical inflammation, etc. Gynecological examination, ultrasound, progesterone and blood HCG (human chorionic gonadotropin) test can be used to make a clear diagnosis, and active treatment can be given.