The medical term for regular vacation is menstruation. Bleeding like menstruation in 5 weeks of pregnancy may be caused by miscarriage or ectopic pregnancy, which needs to be treated after timely examination to confirm the cause and location of the bleeding. 1. Miscarriage. Bleeding in the early stages of pregnancy is likely to be caused by maternal disease or poor embryonic development, trauma and other factors caused by the aura of miscarriage, such as excessive bleeding need to be vigilant about the phenomenon of miscarriage, the need to do ultrasound and blood HCG, progesterone test in time to clarify. If the embryo development is good, HCG doubling normal, can be given under the guidance of the doctor progesterone to protect the fetus, if the bleeding and the amount of menstruation is similar to consider that the miscarriage, such as residue need to be cleared when necessary. 2. Ectopic pregnancy. 5 weeks pregnant bleeding like menstruation may also be caused by ectopic pregnancy, fertilized egg in the uterus outside the bed, the embryo can not develop normally will appear a small amount of vaginal bleeding phenomenon, once the rupture of the extrauterine mass will cause a lot of bleeding and severe abdominal pain symptoms. It is necessary to confirm the diagnosis with ultrasound and blood HCG examination, and give mifepristone or methotrexate tablets for conservative treatment, or suggest surgery as soon as possible. Bleeding in the 5th week of pregnancy like menstruation should not be ignored, you need to complete the relevant examinations in time, to clarify the cause of bleeding and then symptomatic treatment.