Pleural effusion after egg collection is mostly caused by ovarian hyperstimulation, if a small amount of effusion without uncomfortable symptoms, generally do not need special treatment, while a large amount of pleural effusion requires hospitalization and surgery. 1. Small amount of pleural effusion: small amount of pleural effusion usually does not cause chest tightness, dyspnea and other uncomfortable symptoms, usually do not need special treatment, mainly pay attention to rest, monitor the amount of in and out, observe the urine and weight changes, and carry out a high-protein diet, usually can be recovered on their own. 2. Large amount of pleural effusion: If the amount of pleural effusion is relatively large, accompanied by chest tightness, dyspnea and other uncomfortable symptoms, should be hospitalized in time for surgical treatment. The treatment includes thoracentesis and aspiration, closed chest drainage, which can reduce the amount of pleural fluid to improve the symptoms. Thoracic fluid accumulation after egg retrieval needs to be evaluated for severity in the hospital first. If the condition is mild, follow the doctor’s instruction to take rest at home, while the serious condition should be hospitalized in time.