Clinical Edge

Summaries of Must-Read Clinical Literature, Guidelines, and FDA Actions

Second-Trimester Cervical Length

Is there a link to prolonged pregnancy?

There is an increased likelihood of prolonged pregnancy with increasing second-trimester cervical length, according to a study of 9,165 nulliparous women who underwent routine cervical length measurement between 18 and 24 weeks of gestation. A secondary analysis included only women who achieved at least 39 weeks of gestation. Researchers found:

• 16.2% of women had a prolonged pregnancy.

• Women in increasing cervical length quartiles were more likely to experience a prolonged pregnancy.

• The secondary analysis was consistent with the overall analysis.

Citation: Donelan EA, Grobman WA, Miller ES. Association of second-trimester cervical length with prolonged pregnancy. Obstet Gynecol [Published online ahead of print July 15, 2015]. doi: 10.1097/AOG.0000000000000976.