Placenta hypoplasia with fluid in the uterine cavity is caused by blood accumulation in the uterine cavity due to partial abruption of the placenta, which can be treated by bed rest, regular checkups, monitoring of the fetal heartbeat, or the use of medication. 1. Bed rest: Pregnant women with placenta previa hemorrhage and fluid in the uterine cavity need to take bed rest first and avoid strenuous exercise, because failure to pay attention to rest may further lead to placental abruption, resulting in more serious fluid in the uterine cavity, and may even lead to miscarriage or preterm delivery. 2. Regular checkups: pregnant women with placenta previa bleeding and fluid in the uterine cavity, it is best to have regular checkups, because through the checkups, you can observe the condition of the fetus in the abdomen, and deal with it as soon as possible once you find any abnormality, and hospitalization is needed for observation if necessary. 3. Monitoring fetal heart and fetal movement: pregnant women with placenta hyperemic hemorrhage and fluid in the uterine cavity, we should do a good job of monitoring the fetal heart, fetal movement, because the placenta hyperemic hemorrhage and fluid in the uterine cavity, it is easy to further lead to the emergence of fetal distress and other complications, at this time you can be through the fetal heart rate, frequent fetal movement to determine the rough, and timely treatment. 3. Use of medication: Pregnant women with bleeding placenta previa and fluid in the uterine cavity can be treated with drugs such as medroxyprogesterone acetate tablets and ritodrine hydrochloride to preserve the fetus. It is recommended that once a pregnant woman discovers that she has placental hyperemesis resulting in uterine fluid, she should seek timely and complete the relevant examinations and standardized treatment. In addition, the drug may cause certain side effects symptoms, medication should be used under the guidance of a doctor, do not blindly use drugs.