40 days pregnant, abdominal pain falling vaginal bleeding, may be due to preeclampsia, embryonic arrest, ectopic pregnancy and other reasons. 1. Pre-eclampsia: there is often a brown vaginal discharge, review of the uterus is not open, the size of the uterus in line with the month of gestation, can be given rest and medication, such as progesterone, symptomatic relief can continue the pregnancy; aggravation of the symptoms can be developed into a difficult to avoid miscarriage, it should be carried out in a timely manner scraping surgery. 2. Embryonic Fertilization: After the embryo stops developing, the level of estrogen, progesterone and chorionic gonadotropin in pregnant women’s body will decrease, and the embryo loses the support of hormone level, and will bleed, and the patients are mostly accompanied by falling and pain in the abdomen. 3. Ectopic pregnancy: pregnant women with ectopic pregnancy may also experience pain and drop in the abdomen and vaginal bleeding on the 40th day of pregnancy. If the pregnant woman is pregnant for 40 days with pain in the abdomen and vaginal bleeding, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and symptomatic treatment.