Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleScreening for fetal trisomy 21 in the first trimester of pregnancy: maternal serum free β-hCG and fetal nuchal translucency thickness.AuthorsNoble, P. L.; Abraha, H. D.; Snijders, R. J. M.; Sherwood, R.; Nicolaides, K. H.PublicationUltrasound in Obstetrics & Gynecology, 1995, Vol 6, Issue 6, p390ISSN0960-7692Publication typeArticleDOI10.1046/j.1469-0705.1995.06060390.x