| Uterine tandem plane at centre of ovoids (Figure
3) |
Left (cm) |
Right (cm) |
Mean (cm) |
| Fletcher’s 3-channel |
3.1 |
3.5 |
3.3 |
| Uterine tandem with vaginal cylinder |
1.7 |
1.7 |
1.7 |
| Vaginal cylinder plane 1 cm below os guard (Figure
4) |
Left (cm) |
Right (cm) |
Mean (cm) |
| Fletcher’s 3-channel |
2.5 |
2.5 |
2.5 |
| Uterine tandem with vaginal cylinder |
2.0 |
2.0 |
2.0 |