A, miscarriage or pre-eclampsia: once early pregnancy with bleeding and other pre-eclampsia phenomenon, after the determination of intrauterine pregnancy can be bed rest, while oral birth control drugs, such as progesterone, can help the placenta to bed closely to avoid miscarriage. In addition, about half of the miscarriages are caused by embryonic dysplasia and chromosomal abnormalities, which is the natural elimination of the superior and inferior, and should be viewed with a normal mind. When menopause, vaginal bleeding and anal swelling occur, ultrasound, blood test for progesterone and HCG must be done to rule out ectopic pregnancy. Once ectopic pregnancy is clearly diagnosed, it often requires surgery or drug treatment. Third, pregnant women are too tired: if pregnant women are usually too tired and under pressure at work, every time there is a small amount of bleeding, the symptoms can often be improved by more bed rest, although bed rest is the best way to protect the fetus, but it is best to ask the doctor for a clear diagnosis when bleeding is found for the first time to prevent missing the time for treatment. Cervical diseases: cervicitis, cervical erosion and cervical polyps before pregnancy may cause bleeding during pregnancy, which can only be clarified after the doctor’s examination. If the placenta is attached to the lower part of the uterus or even if the edge of the placenta reaches or covers the endocervix, it can be called low placenta or placenta praevia. Low-placed placenta, with the increase in the month of pregnancy placenta may grow upward, the impact on delivery is not significant, but the placenta praevia in pregnancy, there is often painless vaginal bleeding, need to do ultrasound to clearly diagnose, which has a great impact on the pregnant woman as well as the fetus. The first thing you need to do is to get a good idea of what to expect.