Abstract:Objective To investigate the effect of oocyte maturation ratio on the therapeutic effect of patients with ICSI cycle. Methods This study included 194 female infertility patients who required intracytoplasmic sperm injection (ICSI) for ART treatment. Patients were divided into two groups: oocyte maturation ratio ≥ 80% as group A (n = 107 cases), oocyte maturation ratio<80% as group B (n = 87 cases). ICSI fertilization rate, cleavage rate, available embryos, high quality embryos, implantation rate, clinical pregnancy rate and early abortion rate were compared between the two groups. Results There were no significant differences in the number of large follicles, the rate of oocyte acquisition, the days of gonadotropin (Gn) use, the total dose of Gn, the endometrial thickness on days of human chorionic gonadotropin, the number of available embryos, the number of high-quality embryos, the number of transferred embryos, the clinical pregnancy rate, the rate of embryo implantation and the rate of spontaneous abortion between the two groups (P > 0.05). There were significant differences in the number of small follicles, average number of eggs obtained, ICSI fertilization rate and cleavage rate between the two groups (P < 0.05). Conclusion Low oocyte maturation rate may affect fertilization rate and cleavage rate, and reduce oocyte utilization.