After egg retrieval, you should be observed in the hospital for 2 hours, and if you do not experience any discomfort, you can leave the hospital only after the doctor's consent. If there are symptoms such as vaginal bleeding and increasing abdominal pain, the doctor should be notified promptly. Patients who do not have whole embryo freezing should pay attention to the doctor's notification of the time of fresh embryo transfer a few days after egg retrieval. Prohibit sexual intercourse after egg retrieval and have a high protein and light diet. For those who have a higher number of eggs retrieved, notify your doctor if you experience symptoms such as abdominal distension and pain, loss of appetite, difficulty in breathing when lying down, and low urine output, as these symptoms are symptoms of ovarian hyperstimulation. Less severe symptoms require no special treatment with plenty of fluids and rest. More severe ones require hospitalization and treatment such as rehydration and dilatation and monitoring of urine output.