In the third trimester of pregnancy, if there is still blood in the uterine cavity on ultrasound, it is usually considered to be a preeclampsia, in which case the risk of miscarriage is still relatively high. There is also a part of the uterine cavity accumulation of blood, because the early pregnancy has occurred in the first trimester of miscarriage, the accumulation of blood is not completely drained. For this kind of situation: first, pay attention to rest, do not carry out strenuous exercise, and do not have intercourse. Secondly, you need to continue the treatment of fetal preservation, it is recommended to continue to use some of the drugs to preserve the fetus, at the same time, we should dynamically review the ultrasound, to understand whether the accumulation of blood is significantly reduced, but also to understand the development of the fetus. Thirdly, we should pay attention to hygiene, because pregnant women with uterine hematocrit usually have a little vaginal bleeding, so we should pay attention to prevent infection.