Bleeding after the first ten days of pregnancy may be caused by bleeding during the period of implantation, cervical polyps, pre-miscarriage, ectopic pregnancy and so on. 1. Bleeding during implantation: some pregnant women may experience a small amount of vaginal bleeding during the implantation of the fertilized egg, accompanied by slight pain in the lower abdomen, which usually lasts for 3 to 4 days and then gradually returns to normal. 2. Cervical polyp: it can cause repeated small amount of vaginal bleeding without abdominal pain, vaginal speculum examination and ultrasonography can assist in the diagnosis. 3. Pre-eclampsia: ultrasonography suggests a normal pregnancy, but small amounts of vaginal bleeding may occur, accompanied by paroxysmal lower abdominal pain, and progesterone or blood HCG (human chorionic gonadotropin) tests may be low. The combination of history and clinical manifestations may assist in the diagnosis. 4. Ectopic pregnancy: may cause irregular vaginal bleeding, also accompanied by one side of the lower abdomen pain, ultrasonography and blood HCG, laparoscopy can help diagnosis. When bleeding after the first ten days of pregnancy, you need to go to the hospital in time, and identify the cause and actively deal with it.