Abstract:Objective To observe the clinical effect of dexpregnenylestradiol tablets combined with microstimulation program on in vitro fertilization embryo transfer in patients with cervical insufficiency, and to analyze the influencing factors of adverse pregnancy outcome.Methods Totally 120 patients with cervical insufficiency undergoing in vitro fertilization embryo transfer were randomly divided into observation group and control group. The control group was treated with clomiphene micro stimulation, and the observation group was treated with deoxypregnene ethinylestradiol tablets pretreatment combined with clomiphene micro stimulation. The cycle cancellation rate, biochemical pregnancy rate, clinical pregnancy rate, number of retrieved eggs, number of normal fertilized eggs, abortion rate in early pregnancy, serum IGF-1 and IGFBP-3 levels were observed and compared between the two groups.Results The cycle cancellation rate, abortion rate in early pregnancy, late abortion rate, premature delivery rate in the observation group were significantly lower than those in the control group (P < 0.05). Normal fertilization rate, biochemical pregnancy rate, clinical pregnancy rate, number of eggs retrieved, the number of normal fertilized eggs, live birth rate, endometrial thickness on trigger day, and type A endometrial rate were significantly higher than those in the control group (P < 0.05). The difference of serum IGF-1 and IGFBP-3 levels before and after stimulation in the observation group was greater than that in the control group (P < 0.05). Logistic regression analysis showed that infertility age [O^R = 0.882 (95% CI: 0.511, 0.999) ], different stimulation schemes [O^R = 1.062 (95% CI: 1.001, 2.112) ], GTH dosage [O^R = 0.712 (95% CI: 0.526, 0.941) ], number of eggs retrieved [O^R = 1.122 (95% CI: 1.022, 1.201) ], number of available embryos [O^R = 2.012 (95% CI: 1.561, 2.300) ] were risk factors for adverse pregnancy outcomes (P < 0.05).Conclusion Steroid pretreatment combined with clomiphene microstimulation can significantly improve IGF-1, IGFBP-3 levels and pregnancy outcome, and pregnancy outcome is positively related to the number of eggs and embryos available, and negatively related to the total use of GTH.