Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women
Abstract Objective To define transvaginal ultrasound reference ranges for uterine cervix measurements according to gestational age (GA) in low-risk pregnancies. Methods Cohort of low-risk pregnantwomen undergoing transvaginal ultrasound exams every 4 weeks, comprisingmeasurements of the cervical...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Federação Brasileira das Sociedades de Ginecologia e Obstetrícia
2017-09-01
|
| Series: | Revista Brasileira de Ginecologia e Obstetrícia |
| Subjects: | |
| Online Access: | http://www.scielo.br/pdf/rbgo/v39n9/0100-7203-rbgo-39-09-00443.pdf |
| _version_ | 1818743932441329664 |
|---|---|
| author | Kleber Cursino Andrade Thaísa Guedes Bortoletto Cristiane Martins Almeida Renan Antonio Daniel Heloísa Avo Rodolfo Carvalho Pacagnella José Guilherme Cecatti |
| author_facet | Kleber Cursino Andrade Thaísa Guedes Bortoletto Cristiane Martins Almeida Renan Antonio Daniel Heloísa Avo Rodolfo Carvalho Pacagnella José Guilherme Cecatti |
| author_sort | Kleber Cursino Andrade |
| collection | DOAJ |
| description | Abstract Objective To define transvaginal ultrasound reference ranges for uterine cervix measurements according to gestational age (GA) in low-risk pregnancies. Methods Cohort of low-risk pregnantwomen undergoing transvaginal ultrasound exams every 4 weeks, comprisingmeasurements of the cervical length and volume, the transverse and anteroposterior diameters of the cervix, and distance fromthe entrance of the uterine artery into the cervix until the internal os. The inter- and intraobserver variabilities were assessed with the linear correlation coefficient and the Student t-test. Within each period of GA, 2.5, 10, 50, 90 and 97.5 percentiles were estimated, and the variation by GA was assessed with analysis of variance for dependent samples. Mean values and Student t-test were used to compare the values stratified by control variables. Results After confirming the high reproducibility of the method, 172 women followed in this cohort presented a reduction in cervical length, with an increase in volume and in the anteroposterior and transverse diameters during pregnancy. Smaller cervical lengths were associated with younger age, lower parity, and absence of previous cesarean section (C-section). Conclusion In the studied population, we observed cervical length shortening throughout pregnancy, suggesting a physiological reduction mainly in the vaginal portion of the cervix. In order to better predict pretermbirth, cervical insufficiency and premature rupture of membranes, reference curves and specific cut-off values need to be validated. |
| first_indexed | 2024-12-18T02:36:16Z |
| format | Article |
| id | doaj.art-19e597f9398a4986ba22547858697c04 |
| institution | Directory Open Access Journal |
| issn | 0100-7203 |
| language | English |
| last_indexed | 2024-12-18T02:36:16Z |
| publishDate | 2017-09-01 |
| publisher | Federação Brasileira das Sociedades de Ginecologia e Obstetrícia |
| record_format | Article |
| series | Revista Brasileira de Ginecologia e Obstetrícia |
| spelling | doaj.art-19e597f9398a4986ba22547858697c042022-12-21T21:23:46ZengFederação Brasileira das Sociedades de Ginecologia e ObstetríciaRevista Brasileira de Ginecologia e Obstetrícia0100-72032017-09-0139944345210.1055/s-0037-1605556Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant WomenKleber Cursino AndradeThaísa Guedes BortolettoCristiane Martins AlmeidaRenan Antonio DanielHeloísa AvoRodolfo Carvalho PacagnellaJosé Guilherme CecattiAbstract Objective To define transvaginal ultrasound reference ranges for uterine cervix measurements according to gestational age (GA) in low-risk pregnancies. Methods Cohort of low-risk pregnantwomen undergoing transvaginal ultrasound exams every 4 weeks, comprisingmeasurements of the cervical length and volume, the transverse and anteroposterior diameters of the cervix, and distance fromthe entrance of the uterine artery into the cervix until the internal os. The inter- and intraobserver variabilities were assessed with the linear correlation coefficient and the Student t-test. Within each period of GA, 2.5, 10, 50, 90 and 97.5 percentiles were estimated, and the variation by GA was assessed with analysis of variance for dependent samples. Mean values and Student t-test were used to compare the values stratified by control variables. Results After confirming the high reproducibility of the method, 172 women followed in this cohort presented a reduction in cervical length, with an increase in volume and in the anteroposterior and transverse diameters during pregnancy. Smaller cervical lengths were associated with younger age, lower parity, and absence of previous cesarean section (C-section). Conclusion In the studied population, we observed cervical length shortening throughout pregnancy, suggesting a physiological reduction mainly in the vaginal portion of the cervix. In order to better predict pretermbirth, cervical insufficiency and premature rupture of membranes, reference curves and specific cut-off values need to be validated.http://www.scielo.br/pdf/rbgo/v39n9/0100-7203-rbgo-39-09-00443.pdfultrasounduterine cervixcervical lengthreference rangeslow-risk pregnancy |
| spellingShingle | Kleber Cursino Andrade Thaísa Guedes Bortoletto Cristiane Martins Almeida Renan Antonio Daniel Heloísa Avo Rodolfo Carvalho Pacagnella José Guilherme Cecatti Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women Revista Brasileira de Ginecologia e Obstetrícia ultrasound uterine cervix cervical length reference ranges low-risk pregnancy |
| title | Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women |
| title_full | Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women |
| title_fullStr | Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women |
| title_full_unstemmed | Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women |
| title_short | Reference Ranges for Ultrasonographic Measurements of the Uterine Cervix in Low-Risk Pregnant Women |
| title_sort | reference ranges for ultrasonographic measurements of the uterine cervix in low risk pregnant women |
| topic | ultrasound uterine cervix cervical length reference ranges low-risk pregnancy |
| url | http://www.scielo.br/pdf/rbgo/v39n9/0100-7203-rbgo-39-09-00443.pdf |
| work_keys_str_mv | AT klebercursinoandrade referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT thaisaguedesbortoletto referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT cristianemartinsalmeida referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT renanantoniodaniel referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT heloisaavo referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT rodolfocarvalhopacagnella referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen AT joseguilhermececatti referencerangesforultrasonographicmeasurementsoftheuterinecervixinlowriskpregnantwomen |