title: [Sonographic measurement of uterine cervix in pregnancy].
abstract: The objective of this study was to evaluate the accuracy of the measurement of the cervix by comparing transvaginal sonography (TVS) with transabdominal sonography (TAS) and to assess TVS measurement of the cervix in pregnancy. The cervix was measured in the first, second, third trimesters and at term by TVS in 131 normal singleton pregnancies and by TAS in normal pregnant women. The results showed that TVS was better in providing successful rate and accurate identification of uterine cervical length, compared with TAS. The cervical lengths in the first, second, third trimesters and at term were 30.22 mm, 32.25 mm, 30.04 mm and 25.86 mm respectively. The results suggest that TVS be superior to TAS in cervical measurement and that in normal pregnancy, the cervical length does not change significantly until the time when cervical length shortening begins at term.
authors.affiliation: Department of Obstetrics and Gynecology, Second Affiliated Hospital, WCUMS, Chengdu 610041.
authors.forename: H
authors.initials: H
authors.lastname: Yu
authors.forename: W
authors.initials: W
authors.lastname: Li
authors.forename: T
authors.initials: T
authors.lastname: Yang
mesh_terms: D000328:Adult; D000886:Anthropometry / Q000379:methods; D002584:Cervix Uteri / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008991:Monitoring, Physiologic; D011247:Pregnancy; D016216:Ultrasonography, Prenatal