When bleeding occurs at 40 days of pregnancy, the chances of preserving the pregnancy are usually very high as long as the bleeding is not particularly heavy, because it does not mean that the bleeding has miscarried. Sometimes when progesterone is low or HCG is low, there may be a chance of bleeding. At this time, appropriate bed rest and oral medication can play a role in preserving the fetus, so that the bleeding will slowly decrease and the chance of preserving the fetus is still very high at about 70%-80%. If the bleeding is very heavy at the 40th day of pregnancy and the gestational sac has been eliminated, the chance of fetal preservation at this time is not. Because the gestational sac has already been expelled, there is no chance that the pregnancy can be preserved at this time. Therefore, when there is bleeding, timely treatment at the hospital will have a great hope of preserving the pregnancy.