| Variable | VRS | PBAC | Endometrial thickness(cm) | Uterine volume(cm3) |
| Preoperation(n=21) | 4.5±1.0 | 91.4±29.8 | 8.5±2.4 | 135.4±48.5 |
| One month postoperation(n=21) | 1.2±0.5(1) | 76.5±24.8(3) | 6.1±1.4(1) | 116.3±37.5 |
| Two months postoperation(n=19) | 0.5±0.4(1) | 50.8±13.1(1) | 4.6±1.0(1) | 106.8±13.1(2) |
| Three months postoperation(n=17) | 0.3±0.2(1) | 21.2±6.5(2) | 2.3±0.3(1) | 88.6±12.3(1) |
Fig 1 Schematic diagram of hysteroscopic fixation of LNG-IUS at the fundus of uterus A: Micrograsper bought LNG-IUS into the uterine cavity; B: Microscissors cut a wound of about 2 mm in the center of the uterine fundus and a gap about 8-10 mm in deepth was poked; C: The microscissors gripped the nodule of LNG-IUS and poked it into the newly formed gap at the uterine fundus, with the node of LNG-IUS fixed at the uterine fundus.