Midpregnancy Cervical Length in Nulliparous Women and its Association with Postterm Delivery and Intrapartum Cesarean Delivery.

Abstract:

OBJECTIVE:To evaluate the association between midpregnancy cervical length and postterm delivery and cesarean delivery during labor. STUDY DESIGN:In a multicenter cohort study, cervical length was measured in low-risk singleton pregnancies between 16 and 22 weeks of gestation. From this cohort, we identified nulliparous women who delivered beyond 34 weeks and calculated cervical length quartiles. We performed logistic regression to compare the risk of postterm delivery and intrapartum cesarean delivery to cervical length quartiles, using the lowest quartile as a reference. We adjusted for induction of labor, maternal age, ethnicity, cephalic position, preexisting hypertension, and gestational age at delivery. RESULTS:We studied 5,321 nulliparous women. Women with cervical length in the 3rd and 4th quartile were more likely to deliver at 42(+0) to 42(+6) weeks (adjusted odds ratio [aOR] 2.02, 95% confidence interval [CI] 1.07-3.79 and aOR 1.97, 95% CI 1.06-3.67, respectively). The frequency of intrapartum cesarean delivery increased with cervical length quartile from 9.4% in the 1st to 14.9% in the 4th quartile (p = 0.01). This increase was only present in intrapartum cesarean delivery because of failure to progress and not because of fetal distress. CONCLUSION:The longer the cervix at midtrimester the higher the risk of both postterm delivery and intrapartum cesarean delivery.

journal_name

Am J Perinatol

authors

van der Ven AJ,van Os MA,Kleinrouweler CE,Verhoeven CJ,de Miranda E,Bossuyt PM,de Groot CJ,Haak MC,Pajkrt E,Mol BW,Kazemier BM

doi

10.1055/s-0035-1556067

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

40-6

issue

1

eissn

0735-1631

issn

1098-8785

journal_volume

33

pub_type

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