Main finding
The proportion of HBL in TBL is too large to be ignored. Moreover, compared with CLM group, the percentage of HBL in TBL in LESS-M group was higher. And the risk factors for HBL in laparoscopic myomectomy were BMI, age, pre-operative value of Hct, degeneration of leiomyomas, location of leiomyomas cell types of leiomyomas.