Cox proportional hazards analysis
After adjustment for confounding factors including age, previous abortion history, benign ovarian cyst, management and endometriosis, cox proportional hazards analysis revealed that the patients’ age from 20 to 33 years old (AHR = 2.24, 95% CI 1.13 - 4.44), the history of previous abortion (AHR = 1.7, 95% CI 1.05 - 2.82), salpingectomy (AHR = 2.04, 95% CI 1.24 - 3.34), and a combined myomectomy for concurrent leiomyoma (AHR = 2.55, 95% CI 1.22 - 5.33) were positively correlated to live birth (Table S4).