title: Screening for trisomy 21 with ultrasonographic determination of biparietal diameter/femur length ratio.
abstract: Ultrasonographic determination of biparietal diameter/femur length ratios performed at 16 or 17 weeks' gestation in fetuses with trisomy 21 were not statistically different from those of 155 normal fetuses. It appears that this test could not be used for screening for trisomy 21.
authors: Department of Obstetrics and Gynecology, Hôpital Sainte-Justine, University of Montreal, Quebec, Canada.
authors: G P
authors: GP
authors: Marquette
authors: M
authors: M
authors: Boucher
authors: M
authors: M
authors: Desrochers
authors: L
authors: L
authors: Dallaire
mesh_terms: D000328:Adult; D001699:Biometry; D016009:Chi-Square Distribution; D015331:Cohort Studies; D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging*; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D005865:Gestational Age; D006801:Humans; D010294:Parietal Bone / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D011247:Pregnancy; D016216:Ultrasonography, Prenatal