The bleeding like menstruation at the beginning of pregnancy may be caused by preterm miscarriage, incomplete miscarriage, complete miscarriage, ectopic pregnancy, etc. In this case, you should go to the hospital in time to have ultrasound examination and blood HCG and progesterone tests to clarify the cause and then treat the cause. 1. Preterm miscarriage: it is manifested as vaginal bleeding, usually with small amount of bleeding, often dark red, or bloody leucorrhea, similar to bleeding at the beginning of menstruation, and lasts It can last from 4-5 days to more than 1 week. The bleeding may be accompanied by mild lower abdominal pain or low back pain from a few hours to a few weeks after the appearance of the bleeding, and after 12 weeks of pregnancy, women may sometimes feel paroxysmal abdominal pain. Attention should be paid to bed rest, strict prohibition of sexual intercourse, avoiding tension and anxiety, and if necessary, progesterone support therapy can be used under the guidance of a doctor. If the vaginal bleeding stops, abdominal pain disappears and ultrasound confirms the survival of the embryo, the pregnancy can continue. If clinical symptoms worsen, ultrasound reveals embryonic dysplasia, and blood HCG continues not to rise or fall, it indicates that miscarriage is inevitable and the pregnancy should be terminated. 2. Incomplete miscarriage: It shows that part of the pregnancy has been expelled, but part of it remains in the uterine cavity or is still attached to the uterine wall, and the uterus contracts strongly, causing the patient to feel severe abdominal pain and back pain, and the vaginal bleeding is high, similar to menstruation, and the uterine opening is not closed. Treatment should pay attention to the need for immediate cleaning of the uterine cavity if there is no co-infection. If there is already an infection, if the bleeding is low or has stopped, the infection should be controlled first, and after 3-5 days the residual tissue should be gently removed with oval forceps or the uterine wall should be scraped lightly with a blunt scraper. If the signs of infection are obvious and bleeding is heavy, the uterine cavity should be cleaned out while fighting the infection, and the forceps scraping should be performed while intravenous antibiotics and constricting drugs are administered. If part of the embryo or placenta has been expelled and part of it still remains in the uterus, heavy bleeding or even shock may occur, and resuscitation and uterine clearance should be performed at this time. 3. Complete abortion: It is manifested by severe abdominal pain and more blood flowing from the vagina, like menstruation. If all the embryonic tissues have been expelled from the body and the abdominal pain disappears, the vaginal bleeding will gradually stop. Gynecological examination, the uterus is contracting well. Drugs to promote uterine contraction as well as antibiotics to prevent infection, such as motherwort granules and cefixime, can be applied under the guidance of doctors. 4. Ectopic pregnancy: Some people will have irregular small amount of bleeding, similar to menstruation. When ectopic pregnancy ruptures, there will be a sudden tearing pain in one side of the lower abdomen, often accompanied by nausea and vomiting, etc. If blood accumulates in the rectal sink of the uterus, there can be a feeling of swelling in the anus. In this case, the patient must go to the hospital as soon as possible, and in serious cases, surgery is needed; 5. Trophoblastic tumor in pregnancy: it can be manifested as vaginal bleeding after menopause, aggravation of early pregnancy reaction, obvious enlargement of the uterus on examination, ultrasound helps to make the diagnosis, and pathological examination after clearance surgery is needed to confirm the diagnosis, and anti-tumor treatment is carried out under the guidance of doctors.