When a woman has brown discharge in early pregnancy, it is often considered to be caused by the following reasons: firstly, it is considered to be caused by bleeding from the implantation of the fertilized egg, which is often small and can be cleared naturally in about 1-2 days. Secondly, it is considered to be a preterm miscarriage caused by low progesterone, often accompanied by vague abdominal pain and discomfort, and the blood HCG and progesterone will find low progesterone, then it is necessary to carry out fetal preservation treatment. Thirdly, ectopic pregnancy is considered to be caused by a fertilized egg that did not settle in the uterine cavity but settled outside the uterus. In this case, the brown discharge will continue to appear and will be accompanied by constant pain in the lower abdomen, which can cause severe abdominal pain or even hemorrhagic shock when the ectopic mass ruptures.