Seven weeks pregnant, is the early stage of pregnancy, the bleeding situation, consider and external stimulation, pre-miscarriage, ectopic pregnancy, other diseases related. 1. External stimulation: In early pregnancy, the embryo has not yet stabilized, and it is not recommended to have conjugal life at this time. External stimulation causes the endometrium to shed, which can cause vaginal bleeding. 2. Pre-eclampsia: After a woman becomes pregnant, abnormal embryonic development or lowered progesterone causes pre-eclampsia, leading to vaginal bleeding. 3. Ectopic pregnancy: vaginal bleeding accompanied by pain in the lower abdomen, it is recommended to pay attention and go to the hospital for abdominal ultrasonography in time to know whether the bleeding is related to ectopic pregnancy. 4. Other diseases: Excluding the above factors, we can also consider cervical polyps, cervical columnar epithelial ectasia, hyperemesis gravidarum, cervical tumors and other diseases, caused by vaginal bleeding. Pregnancy, is belongs to a special period. Once vaginal bleeding occurs, you should promptly go to the hospital for relevant examinations to understand the causes, but also targeted treatment.