The brown discharge after implantation is usually caused by a small amount of endometrial tissue flaking during fertilization, which usually lasts 1-2 days, and in rare cases, more than 3 days. Usually, there is no obvious reaction to the fertilized egg after implantation and only a few pregnant women may have red or brown discharge, which usually lasts for 2-3 days and stops on its own without affecting the embryonic development. If the brown discharge persists for more than 1 week, it may be a preterm abortion and should be checked by the gynecology department of the hospital for hCG, progesterone and abdominal ultrasound. If the pregnancy is diagnosed to be intrauterine and live, the fetus should be treated with fetal preservation, bed rest, avoiding exercise and abstaining from spicy, stimulating and blood-activating foods. In addition, usually the fetus is unstable in early pregnancy and prone to miscarriage, especially when brown discharge appears, it is necessary to pay attention to whether there is an increase in the amount of bleeding, abdominal pain and whether the bleeding time is prolonged, etc. Once abnormalities are found, it is recommended to go to the gynecology department in time to avoid delaying the condition and increasing the difficulty of treatment.