IVF with polycystic ovary syndrome has a high success rate of up to 50%-60%, especially the cumulative pregnancy rate is very high. The cause of infertility in polycystic ovary syndrome is ovulation disorder. IVF can achieve multiple follicles development through super ovulation promotion, thus forming multiple embryos with high cumulative pregnancy rate. However, the disadvantage of IVF with polycystic ovary syndrome is that it is prone to ovarian hyperstimulation syndrome. When more than 20-25 eggs are retrieved and estrogen reaches more than 5000 pmol/L, the patient is prone to complications such as abdominal distension, ascites formation, hemoconcentration, dyspnea, ionic disorders, hypuria, and even thrombosis. When doing IVF for polycystic ovary syndrome, it is important to control the number of follicles developed to avoid ovarian hyperstimulation symptoms and endanger the patient’s safety.