| Table 3. ET difficulty parameters for semi-rigid and flexible catheters | ||
|
Group 1 Semi-rigid catheter |
Group 2 Flexible catheter |
|
| Blood after ET | 36/363 (9.9%) a | 13/340 (3.8%) b |
| Use of a tenaculum and/or hysterometer | 72/363 (19.8%) a | 20/340 (5.9%) b |
| Ultrasound guidance | 32/363 (12.1%) a | 16/340 (5%) b |
| Retained embryos | 12/363 (3.3%) a | 23/340 (6.8%) b |
| a,b Values with different letters inside the line differed significantly (P<0.05). | ||