In early pregnancy, if there is pelvic effusion, it is often less than 2 cm in the absence of clinical symptoms and is often caused by lubricating fluid from the intestines. This is a normal physiological phenomenon, so clinically there is no need to intervene or give treatment, just pay attention to proper rest, strengthen nutrition and regular maternity checkups during the pregnancy period. If the fluid is deeper than 2 cm and causes clinical symptoms such as lower abdominal pain, clinically it is necessary to consider pelvic fluid caused by pathological conditions. If you have had chronic pelvic inflammatory disease in the past, it is often caused by tissue exudation from pelvic inflammatory disease. It is recommended that anti-inflammatory treatment be given when necessary so that the pelvic fluid can be absorbed as soon as possible.