Transabdominal and transvaginal ultrasound assessment of cervical length - can transvaginal approach be avoided?

Objectives: This study aimed to compare transabdominal (TA) and transvaginal (TV) ultrasound assessment of cervical length during pregnancy and to establish cervical length above which transvaginal measurement is not necessary.

Material And Methods: Cervical length was measured using TA and TV method in the first (11 + 0-13 + 6 weeks), the second (20 + 0-21 + 6 weeks) and the third trimester (28 + 0-31 + 6 weeks) in 250 women with singleton pregnancy and low risk for preterm birth.

Results: If the cervical length measured in the second trimester of pregnancy with transabdominal approach is ≥ 28.