AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, cilt.187, sa.5, ss.1235-1238, 2002 (SCI-Expanded)
OBJECTIVE: The purpose of this study was to determine the Down syndrome sensitivity of early genetic sonography (14-<16 weeks of gestation) and to compare its diagnostic accuracy with that later in the mid trimester (16-24 weeks of gestation).