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Article

Likelihood ratio for trisomy 21 in fetuses with absent nasal bone at the 11–14‐week scan

17 Feb 2004

Abstract excerpt

OBJECTIVE: To update the likelihood ratio for trisomy 21 in fetuses with absent nasal bone at the 11-14-week scan. METHODS: Ultrasound examination of the fetal profile was carried out and the presence or absence of the nasal bone was noted immediately before karyotyping in 5918 fetuses at 11 to 13+6 weeks. Logistic regression analysis was used to examine the effect of maternal ethnic origin and fetal crown-rump...

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PMID: 15027007
DOI: 10.1002/uog.992

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