Bleeding on the 40th day of pregnancy usually refers to vaginal bleeding, when this occurs, it needs to be analyzed specifically according to the amount and duration of bleeding. Usually it can be caused by normal physiological factors, but it can also be caused by abnormal pregnancy such as ectopic pregnancy or pre-eclampsia. Patients need to go to the hospital for ultrasound examination in time to determine the site and cause of bleeding and then treat the cause. Common causes and treatment methods: a. Physiological factors The fertilized egg will destroy the endometrium when it settles in the uterus, which may manifest as a small amount of vaginal bleeding, and the bleeding will be short and can be relieved by rest. Pregnant women need to keep their vulva clean and hygienic, wear loose, breathable cotton underwear, and have regular pregnancy tests. Second, pathological factors 1, pre-eclampsia abortion: manifested as a small amount of vaginal bleeding, because the placenta is not formed in the 9th week of pregnancy, abdominal pain will not be particularly obvious when pre-eclampsia abortion. In this case, it is best to take blood for HCG check in time, and also need to carry out ultrasound examination. If the embryo is developing normally, progesterone or dydrogesterone should be taken under the doctor’s guidance to keep the fetus alive; 2. fetal arrest: after the fetus stops developing and abrupts from the uterine wall, vaginal bleeding will occur, and the ultrasound examination will show that there is no fetal heart or fetal bud in the gestational sac, the fetus has an irregular shape, and there is no fetal heartbeat. However, as the gestational sac increases, it will cause abdominal pain and bleeding. It can be judged by abdominal ultrasound and blood HCG examination, and therapeutic measures should be taken in time after diagnosis, and methotrexate can be applied for conservative treatment or surgical treatment; 4, tumors: such as gestational trophoblastic tumors, or other malignant tumors, manifested as vaginal bleeding after menopause, and the uterus is obviously larger than the week of menopause pregnancy, feasible abdominal ultrasound assisted diagnosis, once diagnosed, the uterus should be cleared immediately, and the final diagnosis can be confirmed by pathology; 5, other: cervical If it is accompanied by obvious discomfort, it is necessary to seek medical treatment in time to avoid delaying the disease. Attention: pay attention to balanced nutrition, avoid spicy and stimulating diet such as chili and onion, and do not eat crab, cinnamon, barley and other foods to prevent aggravation of bleeding. Pay attention to no strenuous exercise, avoid sexual intercourse, and minimize squatting and other movements. You also need to relax your mind and avoid excessive tension, which can lead to uterine contraction.