Relation of cervical length at 22-24 weeks of gestation to demographic characteristics and obstetric history
Braz. j. med. biol. res
;
37(5): 737-744, May 2004. ilus, tab, graf
Article
in English
| LILACS
| ID: lil-357539
RESUMO
Preterm delivery is the main cause of neonatal death and ultrasonographic cervical assessment has been shown to be more accurate than digital examination in recognizing a short cervix. This is a cross-sectional study, involving 1131 women at 22-24 weeks of pregnancy, designed to determine the distribution of cervical length and to examine which variables of demographic characteristics and obstetric history increase the risk of a short cervix (15 mm or less). The distribution of maternal demographic and obstetric history characteristics among patients with cervical length ú15 mm was analyzed and compared to the findings for the general population. Risk ratios (RR) between subgroups were generated from this comparison. Median cervical length was 37 mm and in 1.5 percent of cases it was 15 mm or less. The proportion of women with a short cervix (<=15 mm) was significantly higher among patients with a low body mass index (RR = 3.5) and in those with previous fetal losses between 16-23 weeks (RR = 33.1) or spontaneous preterm deliveries between 24-32 weeks (RR = 14.1). We suggest that transvaginal sonographic measurement of cervical length be performed as part of a routine midtrimester ultrasound evaluation. There are specific variables of demographic characteristics and obstetric history which increase the risk of detecting a short cervix at 22-24 weeks.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Cervix Uteri
/
Ultrasonography, Prenatal
/
Obstetric Labor, Premature
Type of study:
Diagnostic study
/
Etiology study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Female
/
Humans
/
Infant, Newborn
/
Pregnancy
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
2004
Type:
Article
/
Project document
Affiliation country:
Brazil
Institution/Affiliation country:
Clínica de Ultra-som Alpha/BR
/
Universidade Federal do Rio Grande do Sul/BR
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