When a woman has fresh blood in the first month of pregnancy, the exact cause should be diagnosed based on the amount of bleeding and abdominal pain. If the bleeding is as heavy as menstruation without any severe abdominal pain, it is a symptom of biochemical pregnancy in which the fertilized egg does not successfully implant in the uterine cavity, resulting in the flaking of the endometrium, as in the case of menstruation. If the amount of bleeding is low and accompanied by abdominal pain or lumbar discomfort, it is considered to be caused by pre-eclampsia or ectopic pregnancy, and it is necessary to go to the gynecological department of the hospital immediately to check the ultrasound, and also to check the blood HCG and progesterone to confirm the cause of bleeding.