The bleeding on the 40th day of pregnancy is considered to be a pre-eclampsia miscarriage, and it is recommended to go to the hospital as soon as possible for a checkup and then for fetal preservation treatment. If you are 40 days pregnant and your gestational sac has just formed and is still very unstable, and you are bleeding, you should first consider preterm miscarriage, and it is recommended to go to the hospital for an ultrasound examination. If the size of the gestational sac corresponds to the gestational week, whether the opening of the uterus is open, and whether the values of progesterone and human chorionic gonadotropin in the blood are normal, if the opening of the uterus is not open, it is necessary to perform fertility preservation treatment under the guidance of the doctor. If the opening of the uterus is not open, treatment should be performed under the guidance of the doctor. If the opening of the uterus is checked and the pregnancy reaction disappears, forming an inevitable miscarriage, the pregnancy should be ended. If you are bleeding on the 40th day of pregnancy, you should also rule out the possibility of ectopic pregnancy. Ectopic pregnancy is one of the gynecological emergency abdominal diseases, and untimely treatment can lead to hemorrhage. Women who are newly pregnant are advised to take rest and avoid physical labor.