Abstract: Objective: To investigate the risk factors of intrauterine adhesions (IUA) in patients with retained products of conception (RPOC). Methods: 115 patients with RPOC who underwent hysteroscopic surgery from October 2014 to October 2019 in our hospital were recruited in this retrospective study. All patients were divided into IUA group(30 cases) and non-IUA group(85 cases), according to the existence of IUA in hysteroscopic surgery. The risk factors of RPOC complicated with IUA were analyzed. Results: Univariated analysis showed that there were statistically significant differences in the proportion of patients with RPOC duration ＞ 2 months, intrauterine operation during pregnancy, and RPOC blood flow signal between the two groups (all P＜0.05). Multivariate Logistic analysis revealed that intrauterine operation during pregnancy (OR=4.005, 95%CI: 1.077-14.895, P=0.038) and RPOC duration longer than 2 months (OR=3.378, 95%CI: 1.076-10.603, P=0.037) were risk factors of IUA complicated with RPOC. Conclusions: In clinical practice, we should pay attention to the above risk factors of IUA in patients with RPOC, take appropriate measures to avoid unnecessary intrauterine operation during pregnancy and treat RPOC within 2 months after the end of pregnancy to reduce the risk of IUA.

Key words: Retained products of conception;, Tissue adhesions;, Risk factors;, Intrauterine operation, Logistic models