There are many conditions to consider when a pregnant woman has brown vaginal discharge with abdominal pain in early pregnancy. It is usually seen as a normal physiological phenomenon during pregnancy, but some abnormalities during pregnancy such as pre-eclampsia, ectopic pregnancy, etc., may also present with brown vaginal discharge with stomach pain. Therefore, it is recommended that pregnant women seek medical attention in time to avoid delaying their condition. I. Normal physiological changes during pregnancy: fertilized egg implantation: In early pregnancy, the fertilized egg may cause abdominal pain when it enters the uterus for implantation, often accompanied by a small amount of brown discharge from the vagina, which is composed of blood and shed endometrium. The small amount of vaginal bleeding and abdominal pain caused by the implantation of the fertilized egg lasts for 2-3 days and will be relieved once the implantation is complete. If the bleeding is heavy or the abdominal pain is too strong, the pregnant woman should immediately go to the obstetrics department of the hospital to find out the cause and treat the cause. Second, abnormal conditions during pregnancy: 1, pre-eclampsia abortion: early pregnancy, fetal pre-eclampsia abortion can also cause pregnant women to have vaginal bleeding with abdominal pain, generally the amount of bleeding is small, often dark red, or bloody leucorrhea, but sometimes up to 4-5 days to more than a week. The bleeding may be accompanied by mild lower abdominal pain or lower back pain a few hours to a few weeks after the appearance of the bleeding. In such cases, pregnant women need to take proper rest, while intercourse should be avoided. It is recommended to seek medical attention to clarify the cause and then treat it. The former can be treated with progesterone or oral progestin preparations, while the latter can be treated with small doses of oral thyroid tablets. After the vaginal bleeding stops, if the ultrasound examination indicates that the embryo is alive, the pregnancy can continue. If the examination indicates that the embryo is dysplastic, the pregnancy can be terminated under the guidance of the doctor. 2. Ectopic pregnancy: tubal pregnancy is more common and may present with irregular vaginal bleeding, dark red in color and small amount, and brown discharge may appear. If ectopic pregnancy ruptures and bleeds heavily, it can endanger the life of the pregnant woman. It is recommended to seek medical treatment in time, and there are two main clinical treatments, namely surgery and medication, of which surgery includes conservative surgery and radical surgery. In the early stage of pregnancy, gynecological ultrasound examination is recommended to determine intrauterine pregnancy and regular maternity checkup. If abdominal pain with vaginal fluid or other abnormalities occur, it is recommended to seek medical attention in time to avoid abnormalities such as fetal abortion or miscarriage.