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Transvaginal Ultrasound (TVS) cervical Score.
| Score | 0 | 1 | 2 |
| Cervical length | >3 cm | 2-3 cm | < 2 cm |
| Funnel length | Absent | ≤ 0.5 cm | >0.5 cm |
| Funnel width | Absent | ≤ 0.5 cm | >0.5 cm |
| Position of cervix | Curved | - | Straight |
| Distance of presenting part to external os | >3 cm | 2-3 cm | < 2cm |
(Score range: minimum 0, maximum 10)
