title: Change in cervical length after prophylactic cerclage.
abstract: OBJECTIVE
  To determine changes in length of incompetent cervices after cerclage, using transvaginal ultrasound.
  
  
  METHODS
  Patients were enrolled in a prospective, observational study under an Institutional Review Board-approved protocol. McDonald or Shirodkar sutures were placed according to physician preference. Pre- and postcerclage cervical lengths were measured within 72 hours of the procedure. At each examination, the first measurement was discarded, and a mean of the subsequent three measurements was calculated.
  
  
  RESULTS
  Twenty-one Shirodkar and ten McDonald operations were done. The mean (+/- standard deviation) precerclage cervical length was 2.7+/-0.9 cm and the postcerclage cervical length was 3.6+/-0.9 cm (P<.001, paired t test).
  
  
  CONCLUSIONS
  Prophylactic cerclage results in measurable increases in cervical length, which might contribute to the success of the procedure. Further study is needed to determine whether the degree of cervical lengthening after cerclage predicts term delivery.
authors.affiliation: Department of Obstetrics and Gynecology, New York University School of Medicine, New York 10016, USA. eff1@is4.nyu.edu
authors.forename: E F
authors.initials: EF
authors.lastname: Funai
authors.forename: M J
authors.initials: MJ
authors.lastname: Paidas
authors.forename: A
authors.initials: A
authors.lastname: Rebarber
authors.forename: L
authors.initials: L
authors.lastname: O'Neill
authors.forename: T J
authors.initials: TJ
authors.lastname: Rosen
authors.forename: B K
authors.initials: BK
authors.lastname: Young
mesh_terms: D000328:Adult; D002584:Cervix Uteri / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D011247:Pregnancy; D011446:Prospective Studies; D016216:Ultrasonography, Prenatal; D002581:Uterine Cervical Incompetence / Q000000981:diagnostic imaging* / Q000517:prevention & control*