Nasal bone holds key to safer test for birth defects.
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References
Cicero, S. et al. Nasal bone hypoplasia in trisomy 21 at 15-22 weeks' gestation. Ultrasound in Obstetrics and Gynecology, Published online, doi:10.1002/uog.19, (2002).
Cicero, S., Curcio, P., Papageorghiou, K. H., Sonek, J.. & Nicolaides, A.B. Absence of nasal bone in fetuses with trisomy 21 at 11-14 weeks of gestation: an observational study. Lancet , 358, 1665 - 1667, (2001).
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Powell, K. Ultrasound scan spots Down's syndrome. Nature (2002). https://doi.org/10.1038/news021216-14
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DOI: https://doi.org/10.1038/news021216-14