Seeing red bleeding refers to a small amount of vaginal bleeding of pregnant women, the specific color depends on the week of pregnancy as well as different situations. 1.Production: pregnant women see red near the expected date of delivery, usually brown, pink or bright red, the bleeding is small and sticky, which is a normal phenomenon and is a normal performance before delivery; 2.Premature abortion: a small amount of vaginal bleeding occurs in early pregnancy, often thin-like dark red or bloody leucorrhea, no pregnancy material 2. Premature abortion: if a small amount of vaginal bleeding occurs in early pregnancy, usually a thin, dark red or bloody leucorrhea, with no discharge of pregnancy material, followed by paroxysmal lower abdominal pain or low back pain, it can be considered as preterm abortion; 3. Premature labor: if redness occurs in late pregnancy, if the discharged material is pink or slightly red amniotic fluid, and may be accompanied by abdominal pain and other symptoms, it can be considered as preterm labor; 4. It is accompanied by abdominal pain, which can be considered as ectopic pregnancy. If the rupture occurs, the pain will be suddenly felt like tearing in one side of the lower abdomen, often accompanied by nausea and vomiting; 5, abnormal placenta: late pregnancy may also be due to placenta abruptio, placenta praevia, resulting in the redness of the pregnant woman, the color is dark red and the amount is large, need to follow medical advice to further identify the cause.