The main reason for the appearance of cysts in the ovary after egg retrieval is the formation of corpus luteum in the local area after egg retrieval, and the persistence of corpus luteum cysts, which have not atrophied clinically, so ultrasound will find that there are cysts on the ovary, and the diameters of most of them will not be larger than 5cm, so it is suggested that without corresponding symptoms, no treatment is needed, and as long as it is observed closely, it will be fine. It is recommended that if there are no symptoms, close observation is all that is needed. In addition, if there is lower abdominal distension and pain after egg retrieval, and the ovary locally enlarges, and there is low urine output, it may be caused by ovarian hyperstimulation. This situation must be taken seriously, and if necessary, need to be hospitalized as soon as possible to give appropriate treatment, in order to ensure the patient’s life safety.