Bleeding at 6 weeks of pregnancy is commonly caused by factors such as preeclampsia, embryonic abnormality and ectopic pregnancy. 1. Pre-eclampsia: often occurs in 6 weeks of pregnancy, due to the lack of progesterone or due to strenuous exercise, manifested in vaginal bleeding, to prohibit sexual intercourse, fertility preservation treatment. 2. Embryonic abnormality: Vaginal bleeding may occur in the case of hyperemesis gravidarum, embryonic arrest, etc., and the treatment should be timely termination of pregnancy. 3. Ectopic pregnancy: tubal pregnancy is the most common, can occur in 6 weeks of pregnancy, clinical manifestations of menopause, vaginal bleeding, abdominal pain and other symptoms, the need for timely diagnosis, under the guidance of the doctor to give targeted treatment. Bleeding in 6 weeks of pregnancy is an abnormal situation, we must consult a doctor in time, find the cause, timely treatment, so as not to miss the condition.