Pregnancy with a 30x10mm fluid in the uterine cavity, if there are no symptoms is not considered serious, if accompanied by abdominal pain, vaginal bleeding and other symptoms, it may be the first sign of miscarriage, more serious. Fluid accumulation in the uterine cavity is usually blood accumulation in the uterine cavity, for 30x10mm fluid accumulation, the amount of fluid is not large, if there is no symptom of abdominal pain, vaginal bleeding, generally can be considered as physiological fluid, most of which can be absorbed by themselves. However, if the amount of fluid continues to increase or is accompanied by abdominal pain, bleeding and other symptoms, the risk of miscarriage increases, and timely treatment for fertility preservation is needed. Once you find fluid in the uterine cavity after pregnancy, you should go to the hospital in time, complete the relevant examinations under the guidance of a professional doctor, and follow the doctor’s instructions to take further treatment. In addition, you should pay attention to bed rest, avoid exertion.