There is not a clear rule on how long to drink winter melon water after egg retrieval, it can be based on your own situation and dietary habits. You can drink some winter melon water or sports drinks after egg retrieval to help reduce the formation of ascites. After egg extraction, there may be slight osmotic fluid around the ovary, may also be accompanied by slight abdominal pain, lumbago and other uncomfortable symptoms, after the operation can be appropriate to drink some sports drinks or winter melon water and so on, can help diuretic, to avoid the formation of ascites. It is also recommended to eat more high-protein foods to promote nutritional recovery. In addition, it is recommended to rest in bed for 1-2 days after egg retrieval, avoiding exertion and strenuous exercise, in order to prevent ovarian torsion after the operation.