Comparing transabdominal and transvaginal cervical length measurements at mid‐trimester fetal anomaly scan: The impact of bladder fullness and lower uterine contractions

Although transabdominal measurements correlate poorly with transvaginal measurements of the cervix, we demonstrated an improved sensitivity for detecting a short cervix using a transabdominal approach when no contractions or overfilled bladder is present. This potential could be explored in a future study with a larger sample size.