First-trimester screening for trisomy 21 by free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A: impact of maternal and pregnancy characteristics
Version of Record online: 23 APR 2008
Copyright © 2008 ISUOG. Published by John Wiley & Sons, Ltd.
Ultrasound in Obstetrics & Gynecology
Volume 31, Issue 5, pages 493–502, May 2008
How to Cite
Kagan, K. O., Wright, D., Spencer, K., Molina, F. S. and Nicolaides, K. H. (2008), First-trimester screening for trisomy 21 by free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A: impact of maternal and pregnancy characteristics. Ultrasound Obstet Gynecol, 31: 493–502. doi: 10.1002/uog.5332
- Issue online: 23 APR 2008
- Version of Record online: 23 APR 2008
- Manuscript Accepted: 7 MAR 2008
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