Impact of tubal patency test selection on the live birth rate following intrauterine insemination in couples with unexplained infertility: a retrospective cohort study

Objective We planned a study to evaluate the impact of selecting hysterosalpingography (HSG) over diagnostic laparoscopy during initial fertility evaluation on IUI treatment outcomes in couples diagnosed with unexplained infertility. Methods The study comprised a retrospective cohort and included couples evaluated for infertility at our tertiary level hospital between January 2008 and December 2019. Couples diagnosed with unexplained infertility based on tubal patency tests (either HSG or diagnostic laparoscopy) were included. We compared outcomes following ovarian stimulation (OS) and intrauterine insemination (IUI) between women who underwent HSG versus laparoscopy for up to three treatment cycles. Results A total of 7413 women were screened, out of which 1002 women were diagnosed with unexplained infertility. We did not find a significant statistical difference in the clinical pregnancy (16.7% vs. 11.7%; OR (odds ratio) 1.51; 95% CI (confidence interval) 0.90–2.5) or live birth rate per IUI cycle (15.1% vs. 10.7%; OR 1.51, 95% CI 0.9–2.6) in women who underwent HSG for tubal evaluation as compared to laparoscopy. After adjustment for potential confounders through multivariate analysis, we found that outcomes were comparable between the HSG and laparoscopy. Conclusion The current study did not find any significant difference in treatment outcomes following OS and IUI in women with unexplained infertility who underwent HSG compared to laparoscopy for the assessment of the tubal patency during the initial fertility workup. The finding suggests minimal or no impact of selecting HSG over diagnostic laparoscopy as a tubal patency test on the subsequent IUI outcomes.