Bleeding in the eleventh week of pregnancy may be caused by miscarriage, cervical lesions and other reasons. 1. Pre-eclampsia: it can cause a small amount of vaginal bleeding, accompanied by paroxysmal pain in the lower abdomen, ultrasound suggests that the fetal development is normal and the position of the placenta is normal, combined with the clinical manifestations of the diagnosis can be assisted, you need to comply with the doctor’s instructions to preserve the fetus treatment. 2. Cervical lesions: cervical lesions can be manifested as recurrent small amount of vaginal bleeding, not accompanied by abdominal pain, can be assisted in the diagnosis of gynecological examination, ultrasonography, etc., may be found to be functional polyps, or TCT abnormalities, the occurrence of cervical CIN and so on. When bleeding occurs in the eleventh week of pregnancy you need to go to the hospital promptly in order to identify the cause and deal with it aggressively.