Seven weeks pregnant with brown blood is not a good thing, it can be related to pregnancy or caused by non-pregnancy factors. 1. Pregnancy factors: (1) Pre-eclampsia should be highly vigilant, if there is a small amount of brown blood, belonging to the manifestation of pre-eclampsia, timely examination to clarify the cause of birth control treatment. The common cause is luteal insufficiency, if the examination of progesterone, estradiol, hCG suggests that the value of progesterone is on the low side, you need to supplement the progesterone to actively preservation of the fetus treatment. If fetal preservation is effective, the bleeding will gradually decrease and disappear. During the period of fetal preservation, it is necessary to pay attention to rest, regular diet, keep bowel movement, and regular follow-up to understand the development of the embryo. (2) Ectopic pregnancy, if the ultrasound has not been examined to clarify the intrauterine pregnancy, there is a small amount of brown blood need to be wary of ectopic pregnancy, especially if accompanied by abdominal pain symptoms. If the ultrasound suggests that the uterine cavity does not see the gestational sac, in the adnexal area can be seen in the mass, hCG value is relatively low is basically clear. The diagnosis can be confirmed if the gestational sac is visible in the adnexal mass. After clarification, timely surgical treatment is needed to avoid rupture and bleeding of ectopic pregnancy. 2. Non-pregnancy factors, including cervicitis, vaginitis, cervical polyps, etc., may also cause a small amount of local bleeding. If you have brown bleeding symptoms during pregnancy, you need to consult a doctor in time to find out the cause of the bleeding, so as to avoid delay.