In early pregnancy, if the amount of pelvic fluid is relatively small, it is usually physiological and does not require special treatment. If the amount of fluid is large, you should first rule out the possibility of pelvic fluid accumulation due to ectopic pregnancy. When an ectopic pregnancy is miscarried or ruptured, blood accumulates in the pelvic cavity, which will show up as pelvic effusion during ultrasonography. In this case, prompt surgical treatment is usually required. If the pelvic fluid is not caused by ectopic pregnancy, the development of the gestational sac corresponds to the actual gestational week, and the pregnant woman has no obvious clinical symptoms, the treatment can be dispensed with for the time being and reviewed regularly. When the pregnancy is full term and the child is born, appropriate treatment will be taken according to the actual situation.