Abstract: Objective：Investigate the different incidence of congenital uterine abnormalities in infertile women. Methods：From January 2006 to January 2015, the outpatients who undergone hysteroscopy combined with ultrasound in Center of Minimally Invasive Gynecological Surgery of Beijing Obstetrics and Gynecology Hospital were studied, the incidence of congenital uterine abnormalities in primary infertile women (920), secondary infertile women (722) and women with a history of spontaneous abortion (717) were observed and compared. Results：There were 494 cases diagnosed as congenital uterine abnormality. Among them, 408（82.59%） cases  were uterine septum, 34 (6.88%) cases were unicornuate uterus, 5 (1.01%) cases were uterus didelphys, 9 (1.82%) cases were bicornuate uterus, 30 (6.07%) cases were arcuate uterus and 8 cases (1.62%) were T-shaped uterus. The incidence of congenital uterine abnormalities in spontaneous abortion group [40.31% (289/717)] was higher than that of the other 2 groups, the difference was statistically significant (P＜0.05). The incidence of congenital uterine abnormalities in primary infertility group [14.46% (133/920)] was higher than that of secondary infertility group [9.97% (72/722)], the difference was statistically significant (P＜0.05). The incidence of septum uterus in spontaneous abortion group [36.26% (260/717)] was higher than that of the other 2 groups, the difference was statistically significant (P＜0.05), but there was no statistically significant difference in incidence of septum uterus between the primary and the secondary infertility group. The incidence of bicornuate uterus in spontaneous abortion group (0.98%) was higher than that in secondary infertility group, the difference was statistically significant (P＜0.05). The incidence of T-type uterus was highest in the primary infertility group (0.87%). There was no statistically significant difference in the incidence of unicornuate uterus, arcuate uterus and didelphys uterus between 3 groups. Conclusions：Compared with infertile patients, congenital uterine abnormalities had higher incidence in spontaneous abortion patients, especially in bicornuate and uterine septum patients.

Key words:  Infertility, female, Abortion, spontaneous, Congenital uterine anomalies