If you are pregnant and have brown vaginal discharge, it is often due to the following reasons: First, if pregnancy is confirmed by positive blood HCG or positive urine HCG, you must first rule out the possibility of ectopic pregnancy and recommend that blood be drawn every other day to check the blood HCG. If it does not double, but only increases slightly, the possibility of ectopic pregnancy must be ruled out and hospitalization is recommended for dynamic observation. Secondly, if a brown discharge appears in a new pregnancy, it is also clinically important to understand whether it is due to preterm abortion. If intrauterine pregnancy is diagnosed by ultrasound and the yolk sac or germ can be seen, clinical treatment can be given and bed rest is recommended.