title: Cervical length measurement by transvaginal sonography in preterm pregnant women for prediction of preterm birth.
abstract: OBJECTIVE
  To determine the optimal value of cervical length and the presence of funneling in women with preterm labor to predict preterm delivery.
  
  
  METHODS
  Transvaginal sonography to determine cervical length and presence of funneling in 69 pregnant women with gestational age between 24 - 36 weeks who had preterm labor and were admitted to the labor room of BMA Medical College and Vajira Hospital.
  
  
  RESULTS
  The cervical length of women with preterm labor ranged between 10.7-61.2 mm (mean +/- SD = 30.1 + 9.9 mm). The prevalence of preterm delivery was 43.4%. The cervical length of 30 mm had the highest diagnostic performances in predicting preterm delivery, with the sensitivity 93.3%, specificity 82.0%. About 90% of women with funneling presence had preterm delivery.
  
  
  CONCLUSIONS
  The cervical length and presence of funneling in preterm labor women are significantly associated with preterm delivery.
authors.affiliation: Department of Obstetrics and Gynecology, Bangkok Metropolitan Administration (BMA) Medical College and Vajira Hospital, Bangkok 10300, Thailand.
authors.forename: Sujira
authors.initials: S
authors.lastname: Kwasan
authors.forename: Rita
authors.initials: R
authors.lastname: Paisarntuntiwong
authors.forename: Paiboon
authors.initials: P
authors.lastname: Charoenchainont
mesh_terms: D002584:Cervix Uteri / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D011237:Predictive Value of Tests; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D047928:Premature Birth; D012372:ROC Curve; D012307:Risk Factors; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D016216:Ultrasonography, Prenatal / Q000379:methods*