Umbilical cord diameter at 11-14 weeks of gestation: relation to chromosomal defects.
Ultrasound Obstet Gynecol
; 23(3): 237-9, 2004 Mar.
Article
in En
| MEDLINE
| ID: mdl-15027010
ABSTRACT
OBJECTIVE:
To determine the potential value of measuring umbilical cord diameter (UCD) at 11-14 weeks of gestation in screening for chromosomal defects.METHODS:
The UCD was measured in 1323 fetuses immediately before chorionic villus sampling for karyotyping at 11-14 weeks of gestation. In the group of chromosomally normal fetuses, regression analysis was used to determine the association between UCD and crown-rump length (CRL). UCD was compared in normal fetuses and those with chromosomal abnormalities.RESULTS:
The median gestation was 12 (range, 11-14) weeks. The UCD was successfully measured in all cases. The fetal karyotype was normal in 1150 pregnancies and abnormal in 173, including 97 cases of trisomy 21. In the chromosomally normal group the UCD increased significantly with CRL from a mean of 2.9 mm at a CRL of 45 mm to 4.4 mm at a CRL of 84 mm. The UCD in the group of fetuses with trisomy 21 was significantly smaller than normal. Conversely, there were no significant differences from normal in the UCD of fetuses with other chromosomal abnormalities.CONCLUSION:
At 11-14 weeks of gestation the UCD of fetuses with trisomy 21 is significantly smaller than normal but the magnitude of the difference is too small for useful inclusion of this measurement in screening.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Umbilical Cord
/
Chromosome Disorders
/
Fetal Diseases
Type of study:
Diagnostic_studies
/
Screening_studies
Limits:
Adolescent
/
Adult
/
Female
/
Humans
/
Middle aged
/
Pregnancy
Language:
En
Journal:
Ultrasound Obstet Gynecol
Journal subject:
DIAGNOSTICO POR IMAGEM
/
GINECOLOGIA
/
OBSTETRICIA
Year:
2004
Document type:
Article
Affiliation country:
United kingdom
Publication country:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM