title: Transvaginal grey scale histogram of the cervix at 20-25 weeks of pregnancy.
authors.affiliation: Department of Obstetrics, São Paulo Federal University (UNIFESP), São Paulo, SP, Brazil.
authors.forename: Marcio R
authors.initials: MR
authors.lastname: Furtado
authors.forename: Claudio R
authors.initials: CR
authors.lastname: Pires
authors.forename: Edward
authors.initials: E
authors.lastname: Araujo Júnior
authors.forename: Eduardo
authors.initials: E
authors.lastname: De Souza
authors.forename: Luciano M M
authors.initials: LM
authors.lastname: Nardozza
authors.forename: Antonio F
authors.initials: AF
authors.lastname: Moron
mesh_terms: D000293:Adolescent; D000328:Adult; D002584:Cervix Uteri / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D003430:Cross-Sectional Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D008875:Middle Aged; D015588:Observer Variation; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D047928:Premature Birth / Q000453:epidemiology; D015203:Reproducibility of Results; D012307:Risk Factors; D018709:Statistics, Nonparametric; D014463:Ultrasonography; D055815:Young Adult