Ovarian cysts are easy to grow after egg retrieval, diagnosed at the time of ovulation, in the middle of menstruation after ovulation into the luteal secretory phase, there will be luteal cysts occur at this time, most of them have physiological cysts, usually with the menstruation subsides, the time of egg retrieval will not be taken to the end of each follicle, there may be immature small follicles, into the luteal secretory phase will atrophy, the formation of luteal cysts, ultrasound or ultrasound examination may see bilateral ovaries, there are ovarian cysts. This can lead to the formation of luteal cysts, which can be seen on color ultrasound or ultrasound when both ovaries are examined and ovarian cysts are present. If the ovaries are overstimulated during egg retrieval, the follicles and ovaries may be edematous, and the ovaries may be enlarged bilaterally during ultrasound, then ovarian cysts are considered to be present, and should be rechecked 3 days after menstruation is cleared, to see if they are pathologic cysts.